Financial Markets Atlas: Market Infrastructure (UK)

Institution map Capability models Instrument catalogJurisdictionUS CA UK EU

Level 1 flows of the UK market infrastructure: the key exchanges, clearing houses, the CSD and the payment systems of London, one diagram per service, grouped by the institution that runs them (LSEG with the exchange, Turquoise, LCH Ltd’s four services and the bond and FX venues; ICE in London; the LME; Euroclear UK and International; the gilt and OTC venues; the Bank of England; Pay.UK; the other equity venues; CLS). Each diagram follows an illustrative trade or payment through the service’s own cycle with the infrastructure at the center in purple, its members on one side, the clients behind them, the infrastructures it hands off to on the other, and the overseer; the strip above it is the profile (owner, what it handles, members, links, overseer, the clock). Columns are the parties, rows the phases; numbered steps are messages, deliveries, payments or reports between them, with the channel or system in the pill. Hover a step for the detail, click it or use the walkthrough to be taken through the diagram step by step. The institutions are the subject; the products they handle are on the sell-side, buy-side and other pages of this set, and the foreign bank pages show the same infrastructures from the user’s side. UK market conventions and GBP throughout; all numbers illustrative. New to this? Begin with Start here.

Institution

Product

How the diagrams work, the chain every service is a link of, a map of the services by institution, who owns and oversees each, and a glossary.

How to read a diagram

Columns are the partiesThe investors on the left, then the members (the brokers, banks, clearing members and custodians that hold the membership), the infrastructure itself in the middle in purple (the service the diagram is about), the other participants (the market makers, the other side, the trade sources), the infrastructures it hands off to (the CCP behind an exchange, CREST and the Bank of England behind a clearing house) and the overseer on the right.

Rows are the phasesTime runs down the page in the service’s own cycle: the opening auction to the close for an exchange, the trade in seconds to the margin and the compression for a swap CCP, the instructions to the real-time settlement for CREST, the pay-ins to the pay-outs for CLS, the three days of Bacs, the open to the close for CHAPS. The band label gives the timing.

Arrows are stepsNumbered in order. Solid arrows are messages, deliveries or payments; dashed ones are standing flows like reports and oversight; two-headed ones are exchanged or matched. Boxes on the infrastructure’s own lifeline are what it does internally: a novation, a netting run, a settlement cycle.

Pills are the channelAmber for voice and chat, blue for electronic platforms and portals, rose for SWIFT and ISO messages, grey for infrastructure and regulatory systems (the matching engines, the clearing portals, the Bank’s services, the repositories), teal for market data, lavender for the members’ internal systems. Each pill shows a one-line definition on hover.

The strip is the profileAbove each diagram the worked example strip gives the institution’s profile: who owns it, what it handles with illustrative volumes, who its members are, what it links to, who oversees it, and the clock of its cycle. Hovering a step shows the full detail; clicking it opens the walkthrough.

The grouping is by institutionThe area tabs are the groups that run the services (LSEG with the exchange, Turquoise, LCH Ltd and the venues; ICE in London; the LME; Euroclear UK and International; the gilt and OTC venues; the Bank of England; Pay.UK; the other equity venues; CLS) and the product tabs under each are the services with their own mechanics; the facts table below lists every service with the same five columns. The flags open the same chain for the other jurisdictions, where the institutions differ.

A flow can be read two ways: scroll the diagram and hover for detail, or press Walk through the steps above any diagram to follow it one step at a time, with the detail in a card. The arrow keys move forward and back.

The chain every diagram is a link of

BankThe infrastructureClientMarket infrastructuremessage or transferstanding flowexchanged and matchedoption, when needed1sequence, on the party that actsVoice, chatElectronic platform, APIInfrastructure system (payment, clearing, reporting)Internal systemhover an arrow or a badge for the full detail

Every diagram on this page is one link of this chain seen from inside: the venue that matches (an exchange, an MTF, an OTF, a platform), the clearing house that novates and nets, CREST that settles against the cash, and the Bank of England where the cash becomes final; the broker or the bank carries the investor through the chain as the member the investor is not, and the regulators read the record at each link. What the UK version shows is a market where the exchange competes with the MTFs under best execution rather than an order protection rule, where three CCPs compete for the shares under interoperability while the swaps, the gilts and the FX clear at the services of one clearing house, and where the central bank operates the settlement layer itself and supervises the clearing houses and the CSD from the other side of a wall.

The flows, 21 of them

Each card opens its diagram. The tabs at the top do the same; the search box finds a flow by name, rule, report or keyword.

Who owns each service, what it handles, who its members are, what it links to, who oversees it

The same five questions for every service. The answers are what distinguish the UK infrastructure: one listed group owning the exchange, the swap, gilt, FX and equity clearing houses and the bond and FX venues, three CCPs competing for the shares under interoperability, the central bank operating the settlement layer and supervising the clearing houses and the CSD from the other side of a wall, and the recognitions by ESMA and the CFTC that keep the London CCPs open to the EU and US firms.

LSEG

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
LSE	LSEG; a recognized investment exchange	listing and trading of UK equities, ETFs and debt; the opening and closing auctions; GBP 5,000,000,000 a day on SETS	about 300 member firms; the market makers; the RSPs for the retail orders	LCH EquityClear and the interoperable CCPs; CREST on T+2; the APAs; the MTFs it competes with	the FCA, as an RIE and as the listing authority
Turquoise	LSEG as majority owner with the banks and brokers; an MTF in London and in Amsterdam	lit, midpoint and block trading in 4,000 European securities; EUR 2,000,000,000 a day	the member brokers and banks; the buy side through them and on Plato Block Discovery	LCH EquityClear, Cboe Clear Europe and SIX x-clear; CREST and the European CSDs	the FCA for London; the AFM for Amsterdam
SwapClear	LCH Group (LSEG); a recognized UK CCP, a DCO, a tier 2 third-country CCP	interest rate swaps in 27 currencies; USD 8,000,000,000,000 of notional a day	about 100 clearing members (the dealers and the banks); the funds as clients through them	the venues and Markitwire as trade sources; the PPS banks; the Bank of England account; TriOptima	the Bank of England; the CFTC; ESMA as tier 2 to June 2028
RepoClear	LCH Group (LSEG); a service of the same recognized CCP	gilt repo and cash gilts, Treasury bills, £GC; GBP 300,000,000,000 of nominal a day	the clearing members (the GEMMs, the banks); the sponsored members (pension, LDI and money funds) through their sponsors	CREST for the DVP in central bank money; the PPS banks; BrokerTec, Tradeweb and the IDBs as trade sources	the Bank of England; ESMA as tier 2 for the EU members
ForexClear	LCH Group (LSEG); a service of the same recognized CCP and DCO	NDFs in the emerging market currencies, G10 deliverable options, forwards and swaps; USD 100,000,000,000 a day	the FX dealers and banks as clearing members; the funds as clients	OSTTRA’s affirmation platforms; CLS’s CLSClearedFX for the deliverable settlement; the PPS banks	the Bank of England; the CFTC
EquityClear	LCH Group (LSEG); a service of the same recognized CCP	cash equities, ETFs and depositary receipts of the UK, Swiss and European venues; 2,000,000 trades a day	the clearing members (brokers, banks, the general clearing members); the investors behind them	CREST on T+2 and the European CSDs; Cboe Clear Europe and SIX x-clear across the links; the PPS banks	the Bank of England; ESMA as tier 2; the FCA for the venues
Tradeweb and FXall	Tradeweb Markets (listed, LSEG majority-owned); FXall and Matching (LSEG); UK MTFs and an OTF	gilts, credit, swaps and repo by RFQ and order book; FX for the buy side, the corporates and the interbank market; GBP 20,000,000,000 of gilts a day	the dealers as liquidity providers; the asset managers, funds and corporates as users	CREST on T+1; LCH SwapClear and RepoClear; CLS for the FX; the bond tape	the FCA; the AFM and the CFTC for the EU and US entities

ICE in London

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
ICE Futures Europe	ICE; a recognized investment exchange with its own CCP	Brent, gasoil and the oil complex, UK gas, SONIA and Euribor futures, gilt and FTSE 100 futures, carbon allowances; 3,000,000 contracts a day	the clearing members and the non-clearing members, brokers and proprietary firms; the hedgers and funds through them	ICE Clear Europe; the ICE Brent Index; the ARA delivery; the registries; ICE Endex	the FCA as an RIE; the CFTC as an FBOT
ICE Clear Europe	ICE; a recognized UK CCP, a DCO, a tier 2 third-country CCP	the futures and options of ICE Futures Europe and ICE Endex; 4,000,000 contracts a day, 60,000,000 open positions	about 80 clearing members (the FCMs, the banks, the energy traders’ clearers); the clients in their accounts	the APS banks for the cash; the accounts at the Bank of England and the Fed; the delivery mechanisms; ICE Clear Credit for the CDS since 2023	the Bank of England; the CFTC; ESMA as tier 2 to June 2028

LME

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
LME	Hong Kong Exchanges and Clearing; a recognized investment exchange	copper, aluminum, zinc, nickel, lead, tin, the alloys and the cash-settled contracts; 600,000 lots a day worth USD 60,000,000,000	nine Category 1 ring-dealing members; the Category 2 associate broker clearing members; the producers, consumers and funds through them	LME Clear; the licensed warehouses and the LMEsword warrants; LMEsmart; the physical market pricing off the official prices	the FCA as an RIE; the Bank of England for LME Clear
LME Clear	the LME (HKEX); a recognized UK CCP, tier 1 for ESMA	the LME’s forwards and options in the base metals; 600,000 lots a day; USD 15,000,000,000 of initial margin	the clearing members (the Category 1 and 2 members, the banks); the clients in their accounts	the settlement banks in USD, GBP, EUR and JPY; LMEsword and the warehouses; LMEsmart; the collateral custodians	the Bank of England; ESMA as tier 1

Euroclear UK and International

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
CREST	Euroclear SA/NV, user-owned; a recognized CSD and a recognized payment system	UK and Irish shares, gilts, Treasury bills, CDs and CP; 1,000,000 transactions a day worth GBP 1,000,000,000,000	the CREST members (custodians, brokers, the CCPs, the Bank); the settlement banks; the registrars	the Bank of England’s RTGS for the cash; the registrars; LCH EquityClear and RepoClear; Euroclear Bank; HMRC for the stamp duty	the Bank of England under UK CSDR and the Banking Act; the FCA

The Gilt and OTC Venues

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
The Gilt Auctions	HM Treasury, through the DMO (an executive agency)	the issuance of the gilts and Treasury bills by auction, syndication and tender; about GBP 300,000,000,000 of gilts a year	about 18 gilt-edged market makers with the obligation to bid and to make markets; the investors through them	the Bloomberg Auction System and Btender; CREST on T+1; the Debt Management Account at the Bank; Tradeweb and the IDBs; the APF	HM Treasury; the FCA for the GEMMs; the Bank of England as the market’s central bank
The OTC Venues	TP ICAP, BGC, Tradition (the IDBs); Tradeweb, Bloomberg, MarketAxess; MTFs and OTFs under the FCA	swaps, credit indexes, government, corporate and emerging market bonds, repo; USD 2,000,000,000,000 of swaps a day across the London venues	the swap dealers and bond desks; the asset managers, funds and corporates; the IDBs’ desks	LCH SwapClear (CME, Eurex) within seconds; the UK trade repositories; the APAs and the bond tape; CREST and the ICSDs; Markitwire	the FCA for the venues, the trading obligation and the transparency; the Bank of England for the CCPs

The Bank of England

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
RTGS and the Accounts	the Bank of England; RTGS since 1996, RT2 since April 28, 2025	the sterling settlement in central bank money: CHAPS gross, CREST’s DVP, the retail net settlements; GBP 800,000,000,000 a day	about 70 account holders: the banks, building societies, non-bank PSPs and the FMIs; the indirect participants through them	CHAPS; CREST through the settlement banks’ cycles; Bacs, Faster Payments, LINK and the cards; CLS; the CCPs’ payment banks	the Bank’s own FMI supervision; HM Treasury for the recognition orders
CHAPS	the Bank of England, operator since November 2017; a recognized payment system	sterling high-value and time-critical payments, final on settlement; 200,000 a day worth GBP 400,000,000,000	about 40 direct participants (banks, building societies, non-bank PSPs, the FMIs); some 5,000 indirect through the agents	RTGS; CLS’s sterling pay-ins and pay-outs; the CCPs’ payment banks; the CREST settlement banks; the retail systems’ prefunding	the Bank’s FMI supervision; the PSR (folding into the FCA); HM Treasury

Pay.UK

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
Bacs	Pay.UK, owned by its guarantor members; a recognized and designated payment system; Vocalink as infrastructure	Direct Credits and Direct Debits on the three-day cycle; 6,500,000,000 payments a year worth GBP 5,000,000,000,000	about 30 direct participants; the sponsoring banks; some 100,000 service users and the bureaux	the Bank of England’s RTGS for the net settlement on day three with the prefunded cash; Vocalink; the Current Account Switch Service	the PSR (folding into the FCA); the Bank of England; the FCA for the firms
Faster Payments	Pay.UK; a recognized and designated payment system; Vocalink as infrastructure	single immediate payments, standing orders, bulk and corporate files up to GBP 1,000,000; 15,000,000 a day worth GBP 15,000,000,000	about 40 direct participants (banks, building societies, non-bank PSPs); some 400 indirect through the agencies and aggregators	the Bank of England’s RTGS for the prefunded net settlement three times a day; Confirmation of Payee; the open banking APIs	the PSR with the reimbursement regime (folding into the FCA); the Bank of England; the FCA

The Other Equity Venues

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
Cboe UK	Cboe Global Markets; a recognized investment exchange in London, a regulated market in Amsterdam	UK and Swiss equities and ETFs in London, the EEA shares in Amsterdam; the lit books, the periodic auctions, the blocks; GBP 10,000,000,000 a day on the UK books	the member brokers and banks; the electronic market makers; the buy side through the brokers and on BIDS	Cboe Clear Europe as the default CCP; LCH EquityClear and SIX x-clear across the links; CREST and the European CSDs; the APAs	the FCA; the AFM and the DNB for Amsterdam; the Bank of England recognising the CCP
Aquis	SIX Group since July 1, 2025; an MTF and a recognized investment exchange (the Aquis Stock Exchange)	UK, Swiss and EEA equities on the lit book, the market at close and the auction on demand; the growth market’s listings; GBP 1,500,000,000 a day	the member brokers and banks; the market makers under the scheme; the proprietary firms as posters only; the growth companies and their corporate advisers	LCH EquityClear, Cboe Clear Europe and SIX x-clear by the member’s choice; CREST and the European CSDs	the FCA; the AMF for Aquis Exchange Europe in Paris

CLS

Service	Owner and form	What it handles	Members and access	Links to	Overseen by
CLS in Sterling	CLS Group, owned by the member banks; an Edge corporation under the Fed; a recognized payment system in the UK	the sterling legs of FX spot, forwards and swaps, payment versus payment; GBP 350,000,000,000 a day	the London banks and the foreign banks’ London branches among the 70 or so settlement members; the UK banks, funds and corporates as third parties	CHAPS and CLS’s account at the Bank of England; the accounts at the 17 other central banks; the sterling liquidity providers	the Bank of England; the Fed; the CLS Oversight Committee

Glossary

The terms that come back on every diagram. Every pill in the diagrams also shows its definition on hover.

Concepts, terms and rules

Recognized investment exchange: An exchange recognized by the FCA under Part XVIII of FSMA (the London Stock Exchange, ICE Futures Europe, the LME, Cboe Europe, the Aquis Stock Exchange): exempt from authorization as a firm but bound by the recognition requirements on its rules, its systems, its surveillance and its default procedures, with the FCA supervising it; the UK counterpart of a national securities exchange registered with the SEC.

MTF: A multilateral trading facility under MiFID II: a venue run by an investment firm or market operator under lighter rules than a regulated market; Cboe Europe, Aquis and Turquoise for equities, Tradeweb and MarketAxess for bonds, the dark MTFs under the double volume cap.

OTF: An organised trading facility: the MiFID II venue category for non-equities where the operator has discretion in matching (voice and hybrid broking in bonds and derivatives).

Systematic internaliser: An investment firm that deals on its own account against its clients’ orders on an organized, frequent and substantial basis outside a venue (the banks’ and the electronic market makers’ internalisers), publishing quotes under UK MiFIR; the bilateral alternative to the exchanges and the MTFs, and a third of the UK equity volume with the dark pools (illustrative).

Best execution: The manager’s duty to obtain the most favorable terms reasonably available for its clients’ trades, documented by transaction cost analysis and broker reviews.

Share trading obligation: MiFIR’s rule that an investment firm trades shares admitted to trading on a regulated market on a regulated market, an MTF, a systematic internalizer or an equivalent third-country venue, with exemptions for non-systematic and large trades; narrowed to EEA shares by the 2024 review.

Derivatives trading obligation: UK MiFIR’s rule that the liquid standardized derivatives (the SONIA, SOFR and €STR overnight index swaps and the fixed-to-float swaps in the standard tenors, the iTraxx indexes) be executed on a UK trading venue, a US SEF or an EU venue under the FCA’s recognition; the counterpart of the CFTC’s made-available-to-trade rule, with the clearing obligation under UK EMIR behind it.

Double volume cap: MiFIR’s limit on dark trading under the reference price and negotiated trade waivers, replaced by a single 7% cap in the 2024 review.

Reference price waiver: The pre-trade transparency waiver that lets a dark MTF match orders at the midpoint of the primary market’s best bid and offer without displaying them, within the volume cap; the basis of the European dark pools.

Large in scale: The waiver from pre-trade transparency for orders above the size thresholds UK MiFIR sets per share, under which the block platforms (Plato Block Discovery, BIDS) and the dark books match the large orders at the midpoint without displaying them; the post-trade report of a large-in-scale trade is deferred.

Opening and closing auctions: The single-price auctions that open and close the equity exchanges’ day: the on-open and on-close orders and the continuous book are matched at the price that maximizes the volume, with the imbalance published in advance; the closing auction sets the official close the funds are valued at and trades the index rebalances.

Periodic auction: A lit order book that runs frequent batch auctions of up to 100 milliseconds triggered by the orders, publishing the indicative price and volume but not the orders and matching at a single price within a collar around the European best bid and offer; Cboe’s book took much of the flow the dark caps displaced in 2018.

Interoperability: The arrangement under which several CCPs clear the same venue’s trades by the member’s choice, facing each other across the links and exchanging inter-CCP margin when the two sides of a trade clear at different CCPs; LCH EquityClear, Cboe Clear Europe and SIX x-clear interoperate for the UK and Swiss shares, the model the EU’s exchanges did not adopt.

Open offer: The legal basis on which LCH EquityClear becomes the counterparty to both sides at the moment the venue matches the trade, so that no bilateral contract ever exists between the members; the alternative to a novation of an existing contract, with the same effect as NSCC’s guarantee from the point of capture.

Novation: The legal step by which one trade between two parties becomes two trades with the clearing house in the middle.

Netting: Offsetting all of a firm’s buys and sells of the same thing into one net delivery or payment.

Default fund: The prefunded contributions of a clearing house’s members that stand behind the margin in the default waterfall, sized to cover the default of the two largest members under stress for the systemically important CCPs; each LCH Ltd service (SwapClear, RepoClear, ForexClear, EquityClear) has its own; the UK and EU term for the US clearing or guarantee fund.

Default waterfall: The order in which a clearing house absorbs a defaulting member’s losses: the defaulter’s margin and fund contribution, the clearing house’s own contribution, the surviving members’ fund, the assessments on the members, then the recovery tools.

Cover two: The standard for the systemically important clearing houses: prefunded resources sufficient to cover the default of the two members (with their affiliates) that would cause the largest losses under extreme but plausible stress; cover one for the others.

Skin in the game: The clearing house’s own capital placed in the default waterfall ahead of the surviving members’ contributions, the subject of the standing argument between the CCPs and their members on how much it should be.

PAIRS: The Portfolio Approach to Interest Rate Scenarios, SwapClear’s initial margin model: a filtered historical simulation value-at-risk over ten years of yield curve moves scaled to current volatility, applied to the member’s portfolio over a five-day liquidation period (seven for the US client accounts), with the add-ons for liquidity and concentration.

Price alignment: The interest paid or received on the cumulative variation margin of a cleared swap at the overnight rate, so that the daily settlement of the variation margin leaves the cleared swap priced like a collateralized bilateral one.

Settled-to-market: The treatment of a cleared swap’s daily variation margin as a settlement that resets the swap’s value to zero rather than as collateral, which changes its accounting and the leverage ratio treatment; the standard at CME and LCH.

Compression: The replacement of many offsetting cleared swaps with fewer trades of the same risk, run multilaterally by TriOptima (OSTTRA) and by SwapClear’s own tools (the blended-rate and solo compression), which cuts the gross notional, the line items and the leverage ratio exposure; hundreds of trillions of dollars a year at SwapClear.

Sponsored clearing: A clearing member bringing its clients’ trades into the clearing house under its own membership; at FICC, the netting member sponsors money funds, hedge funds and asset managers into the CCP, submits their Treasury and repo trades, guarantees their performance and margins them.

General clearing member: A clearing member that clears the trades of the brokers that are not members of the CCP, carrying them, margining them and answering to the clearing house for them; the UK counterpart of the US clearing firm carrying the introducing brokers.

Active account requirement: EMIR 3.0’s requirement (2024) that firms subject to the clearing obligation keep an active account at an EU CCP for euro and Polish zloty interest rate swaps and euro short-term rate futures, to move clearing from London.

CME-LCH basis: The price difference between the same interest rate swap cleared at CME in Chicago and at LCH in London, a few basis points from the different margin models, the funding of the margin and the balance of the client flows at each CCP; traded by the dealers and arbitraged through their memberships at both.

Tier 2 CCP: A third-country CCP that ESMA has classified as systemically important for the EU under EMIR 2.2 (LCH Ltd and ICE Clear Europe since 2020), subject to ESMA’s direct supervision for its EU-facing business under the Commission’s equivalence decision, extended for the UK CCPs to June 30, 2028; the tier 1 CCPs (LME Clear among them) are recognized with lighter conditions.

Equivalence: The Commission’s decision that a third country’s rules and supervision are equivalent to the EU’s for a given purpose (trading venues, CCPs, exposures to institutions, the MiFIR firms’ regime), which unlocks access or preferential treatment; Japan has equivalence for its venues and CCPs, not for its investment firms.

Delivery versus payment: A settlement in which the securities are delivered only if the payment is made and the payment made only if the securities are delivered, removing the principal risk; model 1 settles both gross and simultaneously (Fedwire Securities), model 2 the securities gross and the cash net (DTC).

Payment versus payment: A settlement in which the two currency legs of an FX trade are settled together or not at all, removing the Herstatt risk; CLS’s mechanism across its accounts at the central banks.

Herstatt risk: The settlement risk of paying one currency of an FX trade before receiving the other, named for Bankhaus Herstatt, closed in June 1974 after receiving its Deutsche mark legs and before paying its dollar legs; the risk CLS was built to remove.

Legal title: In CREST the member is registered as the legal holder on the issuer’s register (the electronic transfer of title since 2001), the investors holding through their brokers’ and custodians’ nominee companies; unlike the US model where every share is registered to DTC’s nominee; the Digitisation Taskforce proposed in 2025 to end the paper certificates and to let the issuers see through the nominees.

Stamp duty reserve tax: The 0.5% tax on the purchase of UK shares, collected automatically through CREST on each settlement (stamp duty on paper transfers), with exemptions for AIM shares, ETFs and intermediaries (the market makers’ relief); the cost every UK retail equity order carries.

Delivery by value: CREST’s collateral mechanism (the DBV) that allocates a basket of securities of a given value from the borrower’s account to the lender’s overnight against the cash, without naming the lines, and returns it in the morning; the mechanism of the overnight gilt repo, the stock loans and LCH’s £GC products, with the term DBV for longer periods.

Self-collateralising repo: The intraday liquidity the Bank of England grants a CREST settlement bank against the securities being settled, so that the bank can fund its members’ deliveries against payment in central bank money through the day; the UK counterpart of T2S’s auto-collateralisation.

Settlement bank: The bank that provides a CREST member with the cash for its settlements and holds the cash memorandum account in CREST mirrored by the funds it earmarks in RTGS at the Bank of England, settling the net with the other settlement banks across the Bank’s accounts in the high-frequency cycles; also the approved banks through which a CCP collects the margin.

T+1: The settlement cycle of the US securities market since May 28, 2024 (Canada and Mexico the day before), one business day after the trade, which halved the margin NSCC holds and set the 21:00 ET affirmation deadline on the trade date; the UK and the EU follow in October 2027.

Prompt date: The delivery date of an LME forward contract: a prompt for every business day out to three months, then weekly to six months and monthly to ten years for copper and aluminum, with the three-month contract as the most liquid; a hedger matches its physical shipment to the day and the carries move a position between prompts; the structure the futures exchanges do not have.

LME warrant: The document of title to one lot (25 tonnes for copper) of an LME-approved brand in an LME-licensed warehouse, held electronically on LMEsword and transferred on the prompt date against the cash through LME Clear; a warrant can be lodged as collateral at the clearing house, taken out of the warehouse or sold; the warehouse stocks the exchange reports are the warrants on and off warrant.

Contingent variation margin: The LME’s treatment of a forward contract’s daily profit and loss for the house positions: collected and held as collateral until the prompt date rather than settled in cash each day as the futures CCPs do (the realized variation margin), a structure LME Clear has been moving away from since the 2022 nickel episode.

Exchange for physical: A transaction in which a futures position is exchanged for the cash security or the physical commodity between two parties off the book (the Treasury basis trade’s mechanism), reported to the exchange and cleared.

Block trade: A large futures or swap trade negotiated privately off the order book above the minimum size, reported to the exchange or the SEF within minutes and cleared like any other; the exchanges set the sizes and the reporting windows.

Bid-price auction: An auction in which each successful bidder pays the price it bid (a multiple-price auction); the DMO’s format for the conventional gilts, where the US Treasury’s auctions are uniform-price with every bidder paying the clearing yield.

Post-auction option facility: The DMO’s facility since 2009 under which the successful bidders at a gilt auction may buy up to 15% more of the gilt at the average accepted price until 14:30 on the auction day, to help the GEMMs absorb the larger auctions.

Syndication: The DMO’s sale of a large or long-dated gilt (a new 30-year, a long index-linked) through four GEMMs appointed as joint lead managers, with the book built in a morning from the investors’ orders at a spread to a reference gilt and the DMO setting the size and the price against the book; about a fifth of the year’s issuance, GBP 10,000,000,000 or more in a day (illustrative).

Real-time gross settlement: A payment system that settles each payment individually and finally in central bank money as it arrives, with no netting and no settlement risk between the participants (Fedwire, T2, CHAPS, Lynx), at the cost of the liquidity each payment needs.

Deferred net settlement: A payment system model in which the payments are cleared through the day and the participants’ multilateral net positions settle later in windows (Bacs once a day, Faster Payments three times a day at the Bank of England), with the credit risk between the cycles capped in the UK by the prefunded collateral; the alternative to real-time gross settlement.

Prefunded settlement: The UK model since 2015 under which the participants of Bacs and Faster Payments hold cash at the Bank of England in collateral accounts that fully cover their net sender caps, so that a participant’s failure between the settlement cycles cannot leave the system short and the loss-sharing among the survivors is gone.

Liquidity-saving mechanism: CHAPS’s mechanism of 2013 that lets the participants queue payments and have the system offset them bilaterally and multilaterally against the payments coming the other way, settling them together, so that each payment needs a fraction of its value in liquidity; CHIPS’s algorithm is the US counterpart.

Throughput rules: The Bank of England’s rules that each CHAPS participant settle half of its day’s value by 12:00 and three quarters by 14:30, so that the payments do not pile into the last hour and the liquidity keeps recycling through the day.

Omnibus account at the Bank: The account model of 2021 under which a regulated payment system operator holds its participants’ funds pooled in one account at the Bank of England so that it can settle on its own ledger in central bank money, built for the tokenized settlement systems; the sterling Fnality system holds the first one.

Direct Debit: The UK pull payment of 1964: an originator with a sponsoring bank collects variable amounts from a payer’s account under an instruction the payer gave once, through Bacs on the three-day cycle, protected by the Direct Debit Guarantee (an immediate refund of any payment made in error, which the bank recovers from the originator); the bills, the subscriptions, the mortgages and the tax run on it.

APP fraud reimbursement: The PSR’s mandatory regime since October 7, 2024 under which the victims of authorised push payment fraud (tricked into paying a fraudster’s account by their own instruction) are reimbursed by the sending and the receiving payment firms half each within five business days, up to GBP 85,000 a claim with an optional GBP 100 excess and an exception for gross negligence.

Confirmation of Payee: The name-checking service run by Pay.UK since 2020 that tells the payer whether the name entered matches the account holder before a Faster Payment or a CHAPS payment is sent, extended to all the payment firms by October 2024; the first line of defense against the misdirected and the fraudulent payments.

Reports, tapes and data

Transaction report: The report of a transaction in a financial instrument that a firm sends to its NCA by the end of the next business day under MiFIR Article 26, through an ARM or directly, with the client identifier; the European audit trail, exchanged between NCAs through ESMA.

ARM: An approved reporting mechanism: the channel through which an investment firm sends its transaction reports (RTS 22, with the client and trader identifiers) to the NCA by the next business day.

APA: An approved publication arrangement: the MiFIR post-trade transparency channel through which an investment firm publishes its OTC and SI trades (price, size, time, with the deferrals for large or illiquid trades); the consolidated tapes will aggregate them.

UK trade repository: A trade repository registered with the FCA under UK EMIR (DTCC Derivatives Repository, UnaVista, ICE Trade Vault) to which both counterparties report every derivative by the next business day with its lifecycle events and daily valuations, on the UTI, UPI and critical data elements since the UK EMIR Refit of September 2024; the FCA and the Bank read it for the market’s exposures.

Consolidated tape: The single feed of trades and quotes across European venues that MiFIR’s 2024 review sets up (bonds first, then equities and derivatives), with the tape providers selected by ESMA from 2025.

UK EMIR Refit: The rewrite of the UK EMIR reporting rules in force since September 30, 2024, aligning the data with the global unique transaction and product identifiers and the critical data elements and the ISO 20022 message format, as the EU did in April 2024 and the CFTC in 2022.

UTI and UPI: The unique transaction identifier and the unique product identifier of the global derivatives reporting standards, adopted by the CFTC, the EU and the UK between 2022 and 2024 with the critical data elements, so that a swap is reported the same way to every repository.

LEI: The legal entity identifier, the 20-character code identifying the parties to the financial transactions under the Global LEI Foundation’s system, required on the derivatives reports and much else since 2012.

Official prices: The LME’s settlement prices (cash, three-month and the longer dates) discovered in the second ring session of the morning, the last bid and offer of each metal, which the physical contracts of the world’s metal trade are priced against with their premiums; the closing prices for the margin and the valuations come from the electronic windows since the reforms after 2022.

ICE Brent Index: The index ICE computes from the physical BFOE forward market’s trades (Brent, Forties, Oseberg, Ekofisk, Troll and WTI Midland since 2023) against which the Brent future settles in cash on its expiry, the last business day of the second month before the contract month; the link between the futures and the physical market.

4pm fix: The WM/Reuters 4pm London fix, now LSEG’s FX benchmark under the UK benchmarks regulation: the rate computed over a five-minute window around 16:00 London from the trades and quotes on the primary venues, at which the funds are valued and the index flows traded; the fixing scandal of 2013 brought the window and the administration under the regulation.

Infrastructure, agencies and authorities

FCA: The Financial Conduct Authority: the conduct regulator of every UK financial firm and the prudential regulator of investment firms, asset managers and the venues; its Handbook (COBS, CASS, SYSC, MIFIDPRU, COLL, MAR) is the rulebook on this page; ESMA’s counterpart and the SEC’s and FINRA’s at once.

Bank of England: The central bank: monetary policy (Bank Rate, set by the Monetary Policy Committee), the reserves accounts and the facilities (the short-term repo facility, the Discount Window Facility), the RTGS and CHAPS, and the supervision of the FMIs (LCH Ltd, ICE Clear Europe, LME Clear, CREST); the PRA sits inside it.

PRA: The Prudential Regulation Authority, part of the Bank of England: the prudential regulator of the banks, the building societies and the insurers (capital, liquidity, ring-fencing, the SREP); an investment firm that is not a bank is the FCA’s alone.

HM Treasury: The UK finance ministry: the owner of the financial services framework under FSMA 2023, the maker of the recognition orders for the payment systems under the Banking Act 2009 and of the regulations the FCA and the Bank implement, the parent of the DMO and the author of the National Payments Vision and the Payments Forward Plan.

PSR: The Payment Systems Regulator, the economic regulator of the designated payment systems (CHAPS, Bacs, Faster Payments, LINK, the card schemes) since 2015 for access, competition and innovation, author of the APP fraud reimbursement regime; being folded into the FCA under the Financial Services and Markets Bill of 2026, with its directions in force until replaced.

ESMA: The European Securities and Markets Authority: writes the technical standards under MiFID II, EMIR, CSDR, the UCITS and AIFM directives, keeps the registers and coordinates the national competent authorities; it supervises a few entities directly (the trade repositories, the credit rating agencies).

CFTC: The Commodity Futures Trading Commission: the US regulator of the futures and swaps markets, the swap dealers, the futures commission merchants and the derivatives clearing organizations, with the cross-border rules that reach the US banks’ foreign branches.

Banking Act 2009: The statute under which HM Treasury recognises the payment systems whose failure would threaten the stability of the financial system (CHAPS, Bacs, Faster Payments, CLS, LINK, Visa Europe, Mastercard, CREST’s payment arrangements, the sterling Fnality system) and brings them under the Bank of England’s supervision; the bank resolution regime is in the same Act.

FSMA: The Financial Services and Markets Act 2000 (amended in 2023), the statute under which the FCA and the PRA authorise and regulate firms and the Treasury designates the activities; the 2023 Act brought the onshored EU rules into the regulators’ rulebooks.

UK EMIR: The onshored EMIR: the clearing obligation for the standard interest rate and credit swaps at a UK or recognised CCP (LCH Ltd, ICE Clear Europe), the margin rules for uncleared derivatives, the reporting of every derivative to a UK trade repository by both counterparties, and the Bank of England’s supervision of the CCPs.

UK MiFIR: The onshored MiFIR: transparency, transaction reporting (Article 26 through an ARM to the FCA), the SI regime and the trading venue rules, amended by the wholesale markets reforms (the share trading obligation and the dark volume caps removed, a bond consolidated tape coming).

UK CSDR: The onshored CSDR rules for CREST as the UK CSD; the UK did not take the settlement discipline regime, so there are no cash penalties on fails and no mandatory buy-ins, and the exchange’s and the CCP’s rules discipline the fails; T+1 comes on 11 October 2027.

CCP resolution regime: The UK regime of 2023 (FSMA 2023, Schedule 11) under which the Bank of England is the resolution authority for the UK CCPs, with the powers to write down the members’ and the CCP’s claims, to call cash from the members and to transfer or run the clearing house in a failure, beyond the CCP’s own recovery plan; the counterpart of the EU’s CCP recovery and resolution regulation.

LSEG: London Stock Exchange Group plc, the listed group that owns the London Stock Exchange and AIM, Turquoise, LCH (majority), Tradeweb (majority), FXall and Matching, FTSE Russell and the data and analytics business of the former Refinitiv (acquired in 2021), whose revenue dwarfs the exchange’s.

LSE: The London Stock Exchange: the Main Market and AIM, the SETS order book for the liquid shares, the closing auction, the retail service provider network for retail orders and the order book for retail bonds (ORB); cleared at LCH Ltd and settled in CREST.

AIM: The London Stock Exchange’s growth market of 1995 for the smaller companies, run on the exchange’s own rules with a nominated adviser for each company rather than the FCA’s listing rules, with the stamp duty exemption on its shares; about 650 companies (illustrative), in competition with the Aquis Stock Exchange’s growth market.

Turquoise: The London Stock Exchange Group’s pan-European MTF (lit, midpoint and the Plato block discovery service), with an EU entity in Amsterdam.

LCH Ltd: The London clearing house of LSEG: SwapClear for interest rate swaps (the largest in the world), RepoClear for gilt and European government bond repo and cash, EquityClear for the London Stock Exchange’s and the MTFs’ equity trades, ForexClear and the £GC products; supervised by the Bank of England; the counterpart of NSCC, FICC and CME Clearing at once.

LCH SwapClear: LCH Ltd’s interest rate swap clearing service in London, the largest in the world, clearing the dealers’ and their clients’ swaps in the major currencies; supervised by the Bank of England, recognized by ESMA and the CFTC.

LCH RepoClear: LCH Ltd’s clearing service for gilt repo and cash gilt trades (and LCH SA’s for the euro government bonds), netting the members’ repo and settling through CREST.

LCH ForexClear: LCH Ltd’s FX clearing service since 2012: the non-deliverable forwards in the emerging market currencies settled as dollar differences at the fixing, the G10 deliverable options (since 2018), forwards and swaps settled payment versus payment through CLS’s cleared service, with its own default fund; it grew on the uncleared margin and capital rules rather than a mandate.

LCH EquityClear: LCH Ltd’s cash equity clearing service for the London Stock Exchange, Turquoise, Cboe’s UK books, Aquis and the other venues, novating under the open offer, netting a member’s trades across the venues into one delivery per ISIN per day and settling in CREST, in competition with Cboe Clear Europe and SIX x-clear under interoperability.

Tradeweb: Electronic marketplace for bonds, swaps and ETFs, mainly request-for-quote to several dealers.

FXall: LSEG’s multi-dealer FX platform where managers put dealers in competition for spot, forwards and swaps.

Matching: LSEG’s anonymous interbank FX order book (the former Reuters Matching of 1992), the primary venue where GBP/USD, EUR/GBP and the Commonwealth and Nordic currencies find their price, with CME’s EBS as its counterpart for EUR/USD and USD/JPY; an MTF under the FCA.

ICE Futures Europe: ICE’s London derivatives exchange (the former LIFFE and IPE): Brent and gasoil, the gilt and SONIA futures, the FTSE 100 futures and options and the UK single stock options; cleared at ICE Clear Europe.

ICE Clear Europe: ICE’s London clearing house for the ICE Futures Europe contracts (Brent, gasoil, gilt futures, SONIA futures, FTSE 100 futures and options, the former LIFFE equity options) and for European and UK CDS; the counterpart of the OCC and CME Clearing for the UK listed derivatives.

ICE Endex: ICE’s Amsterdam exchange, a regulated market under the AFM, listing the TTF gas futures (the European gas benchmark), the Dutch and Belgian power and the EU carbon allowance futures, cleared at ICE Clear Europe in London.

LME: The London Metal Exchange, the base metals exchange (copper, aluminium, nickel, zinc) with its prompt dates and warehouses, cleared at LME Clear.

LME Clear: The London Metal Exchange’s clearing house since September 2014 (the clearing was at LCH before), a recognized UK CCP supervised by the Bank of England, margining the members’ portfolios across the prompt-date structure, accepting the LME warrants as collateral and settling the warrants against the cash on the prompt dates; tier 1 for ESMA; reviewed by the Bank after the nickel episode of 2022.

CREST: The UK central securities depository, run by Euroclear UK & International: the book-entry settlement of UK and Irish shares, gilts and money market instruments, delivery versus payment in central bank money for sterling through the Bank of England’s RTGS (T+2 for shares, T+1 for gilts), the stamp duty reserve tax collection and the corporate actions; the CREST settlement banks provide the participants’ cash; the counterpart of DTC and T2S.

Euroclear: The Brussels-based group: Euroclear Bank is the international CSD for Eurobonds and cross-border holdings (with its triparty and collateral services), and Euroclear’s ESES CSDs (France, Belgium, the Netherlands) are domestic CSDs on T2S.

DMO: The Debt Management Office, the Treasury’s agency that issues the gilts and the Treasury bills through auctions, syndications and tenders with the gilt-edged market makers, manages the government’s cash and runs the purchase and sale service for retail investors; the counterpart of the Treasury’s debt management.

GEMM: A gilt-edged market maker, one of about 18 primary dealers appointed by the DMO with the obligations to bid at every auction, to make continuous two-way prices in the gilts to the investors and to report their positions, and the privileges of the exclusive access to the auctions and the interdealer broker screens; the index-linked GEMMs are a subset.

TP ICAP: The largest interdealer broker, formed in 2016 from Tullett Prebon and ICAP’s voice broking, running the organized trading facilities and the multilateral trading facilities where the dealers hedge their swap, bond, FX and energy trades with each other by voice, hybrid and order book; with BGC and Tradition the dealer-to-dealer market of London.

Bloomberg: Terminal, chat and trading platform used across the market; also a SEF and a bond and FX venue.

MarketAxess: Electronic marketplace for corporate bonds, request-for-quote and all-to-all trading.

RTGS: The Bank of England’s real-time gross settlement service since 1996, the core ledger of the reserves and settlement accounts on which CHAPS settles gross, CREST’s cash leg settles in cycles and the retail systems settle their net positions; renewed as RT2 on April 28, 2025 with ISO 20022 end to end and API access; GBP 800,000,000,000 a day (illustrative).

CHAPS: The UK’s high-value sterling payment system, run by the Bank of England on the RTGS: same-day, irrevocable payments between the banks’ reserves accounts, 06:00 to 18:00, used for the wholesale settlements and the large transfers; the counterpart of Fedwire and T2.

Pay.UK: The operator of the UK’s retail payment systems (Bacs, Faster Payments, the Image Clearing System for cheques, the Current Account Switch Service, Confirmation of Payee) since 2018, a company limited by guarantee owned by its members, with Vocalink running the central infrastructure under contract; regulated by the PSR and supervised by the Bank of England.

Bacs: The UK’s bulk payment system for direct debits and direct credits (salaries, supplier payments), settled on a three-day cycle through the Bank of England; run by Pay.UK.

Faster Payments: The UK’s retail payment system for near-instant transfers up to £1 million between bank accounts, used for the clients’ deposits and withdrawals; Bacs carries the direct debits and the bulk payments; the counterpart of ACH and SEPA.

Vocalink: The central infrastructure provider of Bacs, Faster Payments and the LINK ATM network, the former bank-owned utility bought by Mastercard in 2017, running the systems under contract to Pay.UK and LINK.

LINK: The UK’s ATM network, a scheme of its members (the banks, building societies and the independent ATM operators) run on Vocalink’s infrastructure, settling the interchange net across the accounts at the Bank of England daily; a recognized payment system under the Banking Act 2009.

Cboe Europe: The largest pan-European MTF group (the former BATS Chi-X), with lit, dark and periodic auction books and the BIDS block platform, cleared at Cboe Clear Europe; its Amsterdam entity serves the EU since Brexit.

Cboe Clear Europe: The Amsterdam CCP (formerly EuroCCP) that clears most pan-European cash equity trading on the exchanges and MTFs, in interoperation with LCH SA and SIX x-clear.

SIX x-clear: The Swiss CCP of the SIX group, clearing the SIX Swiss Exchange’s trades and interoperating with LCH EquityClear and Cboe Clear Europe for the London venues’ UK and Swiss shares; supervised by FINMA and recognized by the Bank of England.

Aquis: A pan-European lit MTF with a subscription fee model and no aggressive proprietary trading, serving the EU from its Paris entity.

Aquis Stock Exchange: The recognized investment exchange Aquis bought from NEX in 2020 (the former PLUS and OFEX markets), with a growth market in two segments (Access for the early-stage companies, Apex for the larger) and a main market, each company with a corporate adviser and a lighter rulebook than AIM’s; about 100 companies (illustrative).

SIX: The Swiss exchange group owned by the Swiss banks: the SIX Swiss Exchange, SIX x-clear and SIX SIS (the CSD), the Spanish exchanges (BME) since 2020 and Aquis since July 1, 2025 (GBP 207,000,000), with the plan of a pan-European exchange combining the Swiss and Spanish primary markets with the Aquis MTF.

CLS: CLS Bank settles both sides of a currency trade at the same moment (payment versus payment) so neither party pays without receiving.

CLSNet: CLS’s bilateral netting calculation service for the FX trades in the currencies and between the counterparties outside the CLS settlement, which standardizes the netting without the payment-versus-payment settlement.

OSTTRA: The post-trade services company formed in 2021 from CME’s and IHS Markit’s businesses (MarkitServ, Traiana, TriOptima, Reset): the affirmation and confirmation of the OTC derivatives and FX trades, the connectivity to the clearing houses, the compression and the reconciliations.

Markitwire: Electronic confirmation and affirmation platform for swaps, also the route into clearing houses.

BrokerTec: The main interdealer order book for US Treasuries and repo, owned by CME.

Registrar: The issuer’s agent (Computershare, Equiniti, MUFG Corporate Markets) that keeps the register of the legal holders of its shares, updates it within two hours of each CREST settlement, pays the dividends to the registered holders and runs the corporate actions and the meetings; the UK counterpart of the US transfer agent, with the legal title on its register.

Inside the infrastructure: systems and documents

Millennium: The London Stock Exchange’s matching engine (Millennium Exchange, the MillenniumIT technology the group bought in 2009), running SETS and the auctions with the uncrossing algorithm; licensed to other exchanges as LSEG Technology.

SETS: The London Stock Exchange’s electronic order book for the FTSE All-Share and other liquid shares, with the opening and closing auctions and the market makers’ quotes beside it; the reference price for the RSP quotes and the dark MTFs.

RSP: The retail service provider network: the UK’s retail execution system, in which a retail broker’s order system requests quotes from several market makers (Winterflood, Peel Hunt, Stifel, the banks’ retail desks) and executes against the best within seconds, at or inside the order book price; the counterpart of the US wholesalers, without payment for order flow.

Plato Block Discovery: Turquoise’s block service of 2016, built with the Plato Partnership of asset managers and banks: the brokers and the buy side post conditional block indications matched under the large-in-scale waiver, firm up within a short window and execute at the midpoint, with a reputational scoring for the participants who fail to firm up.

ClearLink: LCH’s interface through which the venues, the affirmation platforms and the members submit the trades to SwapClear and ForexClear and receive the acceptance within seconds; the straight-through processing link of the clearing.

PPS: LCH’s protected payments system: the commercial banks that hold the members’ accounts and confirm the margin and settlement payments to the clearing house by the morning deadline under the assured payment agreements that make the confirmation irrevocable; ICE Clear Europe’s assured payment system is the counterpart.

APS banks: ICE Clear Europe’s assured payment system banks, the commercial banks that hold the members’ accounts in sterling, euros and dollars and confirm the margin payments to the clearing house by the morning deadline under the assured payment agreements; LCH’s protected payments system is the counterpart.

TriOptima: The compression service (triReduce) now part of OSTTRA that runs the multilateral compression cycles at SwapClear and the other CCPs, replacing many offsetting trades with fewer trades of the same risk; triResolve is its portfolio reconciliation service.

ICE platform: ICE’s electronic trading platform for its futures exchanges, with the ICE Trading Platform’s order book and the market data.

ICE Block: ICE’s facility for reporting the privately negotiated block trades and the exchange for physical and exchange for swap transactions into the exchange and the clearing house, above the minimum sizes and within the reporting windows the exchange sets.

Ring: The LME’s open-outcry floor at Finsbury Square, where the Category 1 ring-dealing members trade each metal in five-minute sessions and the official prices are discovered in the second morning ring; the last open-outcry floor in Europe, kept after the 2021 proposal to close it, beside LMEselect and the telephone market.

LMEselect: The London Metal Exchange’s electronic trading screen, alongside the ring and the inter-office telephone market.

LMEsmart: The LME’s trade matching system through which the members enter and match the inter-office telephone trades within the time limit, so that every trade is registered at LME Clear; the ring and LMEselect trades are captured at the match.

LMEsword: The LME’s electronic system for transferring warrants, the documents of title to metal in approved warehouses.

Settlement instruction: The instruction a CREST member sends for a delivery (the ISIN, the quantity, the counterparty, the cash consideration, the settlement date) that CREST matches with the counterparty’s instruction before the settlement day; through the CREST interface or the ISO 15022 messages.

DBV: Delivery by value, CREST’s collateral mechanism that allocates a basket of securities of a given value from the borrower’s account to the lender’s overnight against the cash and returns it in the morning, used for the overnight gilt repo, the stock loans and LCH’s £GC products; the term DBV holds for longer.

SDRT: The stamp duty reserve tax of 0.5% on the purchase of UK shares, computed by CREST on each settlement from the price and the flags (the exemptions for AIM, ETFs and the intermediaries’ relief) and collected from the buyer’s settlement bank for HMRC; about GBP 3,000,000,000 a year (illustrative).

Bloomberg Auction System: The electronic bidding system through which the gilt-edged market makers submit their bids to the DMO’s gilt auctions and receive the allotments.

Btender: The Bank of England’s electronic tender system through which the participants bid in the Bank’s operations (the short-term repo, the indexed long-term repo, the gilt sales).

DMO announcement: The DMO’s publication of the auction calendar and of each auction’s terms (the gilt, the amount, the date and time) and results (the average price, the tail, the cover).

Bookbuilding: The process by which the lead managers of a syndication collect the investors’ orders at a spread to a reference gilt over a few hours and the DMO sets the size and the price against the book before the allocation; the method for the long-dated and index-linked gilts.

IDB screen: The interdealer brokers’ electronic screens (BrokerTec’s order book, the voice brokers’ screens) on which the GEMMs trade the gilts among themselves anonymously; the dealer-to-dealer market the investors do not see.

Broker screen: The interdealer brokers’ hybrid screens on which the voice brokers post the dealers’ interests and match the swap, bond and FX trades with discretion under the organized trading facility rules, beside the pure order books of their MTFs.

RT2: The Bank of England’s renewed RTGS service, live since April 28, 2025: the new core ledger on which CHAPS and the other settlements run, with ISO 20022 end to end, API access, the synchronisation interface and the capacity for near 24-hour operation; the result of the renewal program launched in 2017.

Reserves account: A bank’s or branch’s account at the Bank of England under the Sterling Monetary Framework, remunerated at Bank Rate with no reserve requirement, used for the CHAPS and CREST settlement and as the sterling liquidity buffer.

STR: The Bank of England’s short-term repo: the weekly operation lending reserves for seven days at Bank Rate against level A collateral without limit, the ordinary source of reserves as quantitative tightening shrinks the Bank’s balance sheet.

ILTR: The Bank of England’s indexed long-term repo: the monthly auction lending reserves for six months against the wider collateral sets at spreads set by the auction.

DWF: The Bank of England’s Discount Window Facility: the bilateral facility lending gilts or reserves for 30 days against the wide collateral sets at a fee by collateral type, for a firm’s own stress; the PRA expects every firm to have tested it.

Bacstel-IP: The secure internet channel through which the service users and the bureaux submit their Bacs files (the Direct Credits, the Direct Debit collections) and receive the reports, under the service user number and the smart card or the HSM authentication.

Open banking API: The APIs the UK banks expose under the open banking rules (the CMA order of 2017 and the FCA’s regime since) through which a licensed third party initiates a payment from the customer’s account (the Pay by Bank flows) or reads the account data with the customer’s consent; the payment rides on Faster Payments.

BIDS: Cboe BIDS Europe, the block trading platform (the BIDS Trading business bought in 2020) on which the buy side posts conditional block orders anonymously under the sponsorship of its brokers and matches them with the brokers’ and the other institutions’ indications at the midpoint under the large-in-scale waiver, with a firm-up and a reputational scoring.

Conditional order: An order on a block platform that represents the participant’s interest without committing it: a match generates an invitation to firm up within a short window, after which the trade executes, and a participant who fails to firm up loses reputational score; the mechanism of Plato Block Discovery and BIDS.

AQSE: The Aquis Stock Exchange’s admission and trading platform for the growth market’s companies, with the Access and Apex segments and the corporate advisers; the shares trade on the Aquis book with the market makers.

Corporate adviser: The adviser each company on the Aquis Stock Exchange’s growth market must retain to guide it through the admission and the continuing obligations, as AIM requires a nominated adviser; usually a small broker or an advisory boutique.

Margin call: The clearing house’s demand to its members (and the members’ to their clients) for the initial margin on the new positions and the variation margin on the day’s moves, to be met by the morning deadline through the settlement banks.

Clearing portal: The clearing firm’s site for its introducing brokers: accounts, orders, cashiering, margin, reports, exception queues.

Default management: The clearing house’s process when a member fails: the declaration, the porting of the clients, the hedging of the house portfolio with the default management committee of member traders, the auction to the surviving members, the waterfall.

Auction: The clearing house’s sale of a defaulting member’s portfolio to the surviving members, who are obliged to bid; also the ISDA auction that sets the recovery price after a credit event and the settlement auctions of the exchanges.

Pay-in schedule: CLS’s notice to each settlement member, issued the evening before the value date, of the net amounts it must pay into CLS’s account at each central bank by the hourly deadlines of the settlement window.

ISO 20022: The international standard for the financial messages (the pacs.008 customer credit transfer, the pacs.009 bank transfer, the camt statements) with the structured data the old formats lacked, adopted by T2 in 2023, CHAPS in 2023, CHIPS in 2024 and Fedwire in 2025.

Trade capture: The front-office system where every trade is booked and positions, risk and P&L are kept, one per desk family in most banks (Murex MX.3, Calypso, Summit, Bloomberg TOMS, Fidessa, in-house).

Reporting hub: The engine that turns bookings into regulatory reports (TRACE, CAT, SDR, SBSDR, RTRS, FR 2052a) and tracks acknowledgments and rejects (DTCC Report Hub, AxiomSL, in-house).

SWIFT message types used in the diagrams

MT300: SWIFT confirmation of an FX trade.

MT305: SWIFT confirmation of an FX option.

MT320: SWIFT confirmation of a fixed-term loan or deposit.

MT950: SWIFT account statement from a correspondent bank.

camt.053: ISO 20022 end-of-day bank account statement, the successor to MT950.

MT535: SWIFT statement of securities holdings from a custodian.

MT541: SWIFT instruction to receive securities against payment.

MT543: SWIFT instruction to deliver securities against payment.

camt.057: ISO 20022 notice to the account holding bank or custodian to expect an incoming payment, the successor of the MT210.

MT900: SWIFT debit confirmation from a bank.

MT304: SWIFT advice of an FX trade from a manager to its custodian, so the custodian can settle it.

MT545: SWIFT confirmation from the custodian that securities were received against payment.

MT547: SWIFT confirmation from the custodian that securities were delivered against payment.

MT548: SWIFT settlement status from the custodian: pending, matched, failed, with the reason.

MT566: SWIFT corporate action confirmation: the cash or securities credited for an event.

MT540-543: SWIFT instructions to receive or deliver securities, with or without payment; used to move collateral.

MT515: SWIFT client confirmation of a securities trade.

MT527: SWIFT triparty collateral instruction.

MT600: SWIFT confirmation of a precious metals trade.

MT604: SWIFT precious metals transfer or allocation instruction.

MT670: SWIFT standing settlement instruction update: how a counterparty notifies its SSIs by authenticated message.

MT340: SWIFT confirmation of a forward rate agreement.

MT564: SWIFT corporate action notification from a custodian or depository: the event, the options and the deadline.

MT502: SWIFT order to buy or sell securities, sent by a client to its broker or manager.

MT509: SWIFT trade status message from a broker or custodian.

MT101: The SWIFT request for transfer a corporate sends its bank, or a bank sends another, to move funds from the customer’s account.

MT700: The SWIFT message by which a bank issues a documentary credit to the advising bank.

MT710: The SWIFT advice of a documentary credit issued by a third bank, sent by the advising bank onward.

MT742: The SWIFT reimbursement claim a paying or negotiating bank sends the reimbursing bank under a documentary credit.

MT754: The SWIFT advice of payment, acceptance or negotiation sent by the paying bank to the issuing bank under a documentary credit.

MT799: The SWIFT free-format message between banks, used for trade finance correspondence and bank-to-bank undertakings.

MT940: The SWIFT customer statement message a bank sends an account holder (or its other bank) with the day’s entries and balances.

MT540: The SWIFT instruction to receive securities free of payment, used for the stock loans and the collateral deliveries.

MT306: The Swift confirmation of the FX options the MT305 cannot describe: average rate (Asian) options and forwards, barriers, digitals and other exotic structures, with their averaging or observation dates.

MT380: The Swift FX order: an investment manager instructs its custodian to buy or sell a currency for a fund; the custodian confirms the execution with an MT381.

MT606: The Swift precious metal debit advice: the account keeper tells the account owner its metal account was debited, with the bar list when the metal moves into allocated bars.

MT607: The Swift precious metal credit advice: the account keeper tells the account owner its metal account was credited, in fine troy ounces.

MT608: The Swift statement of a metal account: the opening and closing balances in ounces and the movements of the period, or the bars held in an allocated account.

LSEG›LSEInstrument card: Share

The London Stock Exchange: the Equities Day From the Opening Auction to the Close, SETS, the RSPs and the Tape

The London Stock Exchange’s day: the call for the opening auction from 07:50 and the uncrossing at 08:00 on the Millennium engine, continuous trading on SETS beside the MTFs and the systematic internalisers under the broker’s best execution duty with no order protection rule, the exchange’s feeds and the public reports with no equity tape yet, the retail order executed by the RSPs off the book with the stamp duty reserve tax, the closing auction at 16:30 that sets the price the funds are valued at, the trades to the CCP of the member’s choice and CREST on T+2, and the FCA as the regulator of the recognized investment exchange and as the listing authority.

Worked example, illustrative:owner London Stock Exchange Group plc, listed on its own market; the exchange of 1801, the Milan exchange sold with Borsa Italiana in 2021; the data business since Refinitiv dwarfs ithandles listing and trading of UK and international equities, ETFs and debt; about 1,600 companies on the Main Market and AIM; GBP 5,000,000,000 a day on SETS, illustrativemembers about 300 member firms (brokers, banks, the market makers); the retail service providers; the nominated advisers on AIMlinks LCH EquityClear, Cboe Clear Europe and SIX x-clear under interoperability; CREST for the settlement on T+2; the APAs; the MTFs it competes withoverseen by the FCA, as a recognized investment exchange and as the UK Listing Authoritythe day 07:50 opening call; 08:00 uncrossing; 16:30 to 16:35 closing auction; the closing price crossing session after; the trades to the CCP the same evening

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The London Stock Exchange is a listing franchise and two auctions a day: the opening and the closing uncrossings are what the lit alternatives do not have, and the closing price is what the index money trades on. Between them it is one order book among several under best execution rather than an order protection rule, and the trades leave for the CCP and CREST at night.

The venues: UK shares trade on the London Stock Exchange, on the MTFs (Cboe Europe’s UK books, Turquoise, Aquis), on the systematic internalisers (the banks and the electronic market makers dealing on their own account) and in the dark pools, with the exchange holding about half of the lit volume (illustrative); the UK removed the share trading obligation and the dark volume caps in the wholesale markets reforms, so the broker’s best execution duty, not a rule, routes the order.
The listing regime: the FCA runs the Official List as the UK Listing Authority under the UK Listing Rules, rewritten on July 29, 2024 into a single equity shares (commercial companies) category with a disclosure-based regime in place of the premium and standard segments; the exchange admits the shares to trading under its own standards; AIM, the growth market of 1995, runs on the exchange’s rules with a nominated adviser for each company; PISCES, the intermittent trading platform for private company shares, opened in 2025 beside them.
The stamp duty: the stamp duty reserve tax of 0.5% on the purchase of UK shares is collected automatically by CREST on each settlement and paid to HMRC, with the exemptions for AIM shares, ETFs and the intermediaries (the market makers’ relief); it is the cost every UK equity purchase carries and the subject of a standing argument about London’s competitiveness.
T+1: the UK moves its settlement cycle from T+2 to T+1 on October 11, 2027, the date the EU and Switzerland chose as well, after the Accelerated Settlement Taskforce’s report of 2024; the US moved in May 2024; the exchange, LCH and CREST are rebuilding the post-trade timetable (the allocations and confirmations on T) for it.

LSEG›Turquoise

Turquoise: the MTF With the Lit Book, the Midpoint Book and Plato Block Discovery, in London and in Amsterdam

LSEG’s multilateral trading facility: an institutional order sliced across the venues by the broker’s router, the lit book competing with the exchange in the same shares, the midpoint book under the reference price waiver with the UK’s dark cap gone, Plato Block Discovery matching conditional block indications with a firm-up, the trade to the CCP of the member’s choice under interoperability and the settlement in CREST and the European CSDs, the two books in London and Amsterdam since Brexit, and the FCA’s and the AFM’s authorization of the MTFs owned by LSEG with the banks.

Worked example, illustrative:owner LSEG as majority owner with the banks and brokers that founded it in 2008; Turquoise Global Holdings Limited in London, Turquoise Global Holdings Europe B.V. in Amsterdamhandles lit, midpoint and block trading in 4,000 European securities across 19 markets; EUR 2,000,000,000 a day, illustrativemembers the member brokers and banks; the asset managers through them and on Plato Block Discoverylinks LCH EquityClear, Cboe Clear Europe and SIX x-clear as interoperable CCPs; CREST and the European CSDs for the settlement; the primary markets’ prices as referencesoverseen by the FCA for the London MTF; the AFM for the Amsterdam MTFthe day the lit and midpoint books with the primary markets’ hours; the block indications through the day; the trades to the CCPs at the match

Turquoise is LSEG competing with itself: a lit book, a midpoint book and a block service in the same shares as the exchange, built with the brokers who route to it. It matches and hands off, with a CCP of the member’s choice behind every trade, and since Brexit it runs twice, in London and in Amsterdam.

MTFs and exchanges: a multilateral trading facility is a venue authorized under MiFID to match orders by non-discretionary rules without a listing function; the UK MTFs (Turquoise, Cboe’s UK books, Aquis) trade the shares the exchanges list and compete on fees, speed and order types; the exchange keeps the auctions, the listing and the reference price, so the closing auction and the midpoint reference tie the alternatives to it.
The waivers: pre-trade transparency can be waived for orders matched at the midpoint of a reference price (the reference price waiver), for negotiated trades and for orders large in scale, which is what the dark books and the block platforms run on; the EU caps the dark trading under the first two waivers (a single 7% cap since the 2024 MiFIR review), the UK removed its caps and lets the venues set their minimum sizes.
Interoperability: the UK and the Swiss cash equity markets let a venue’s members choose among several CCPs (LCH EquityClear, Cboe Clear Europe, SIX x-clear), with the CCPs clearing each other’s trades and posting inter-CCP margin; a member’s trades on several venues net at the one CCP it chose, the competition that keeps the clearing fees down and that the EU’s markets have mostly not adopted.
Brexit and the two books: the EU’s share trading obligation requires EU firms to trade EEA shares on EU venues, so from January 2021 the EEA shares moved from London to the MTFs’ Amsterdam and Paris entities (Turquoise, Cboe, Aquis) overnight, and the UK shares stayed; the London and the European books run on the same systems with the same members, and the Swiss shares returned to London when the UK recognized the Swiss venues in 2021.

LSEG›SwapClearInstrument card: Interest Rate Swap

LCH SwapClear: the Swap From the Venue in Seconds, PAIRS Margin, Compression, the Default Management and the Tier 2 Recognition

LCH Ltd’s interest rate swap service: a SONIA swap from Tradeweb or Markitwire accepted and novated within seconds, registered in the member’s house or client account with the segregation models, the initial margin on PAIRS and the daily variation margin with the price alignment interest paid through the protected payments system, the lifecycle with the fixings and the coupons netted per currency, the compression that cuts the notional, a member default handled by hedging, auctions and porting under the waterfall, and the oversight by the Bank of England with the CFTC’s DCO registration and ESMA’s tier 2 recognition.

Worked example, illustrative:owner LCH Group, majority-owned by LSEG with the members as minority shareholders; LCH Ltd in London (the London Clearing House of 1888), LCH SA in Parishandles interest rate swaps, overnight index swaps, basis swaps, inflation swaps in 27 currencies; USD 8,000,000,000,000 of notional a day, illustrativemembers about 100 clearing members (the dealers and the banks); the funds and corporates as clients through themlinks the venues and Markitwire as trade sources; the PPS banks for the cash; LCH’s account at the Bank of England; TriOptima for the compressionoverseen by the Bank of England as a recognized CCP; the CFTC as a DCO; ESMA as a tier 2 third-country CCPthe cycle acceptance in seconds; the margin by the morning PPS deadline; the variation margin daily; compression in cycles

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SwapClear takes a swap from the venue in seconds and holds it to maturity, which can be fifty years, against margin computed every day and a default fund the members share. The Lehman close-out proved the model, and the EU’s active account rule is the one attempt to move its euro business.

LCH: the London Clearing House of 1888 (the London Produce Clearing House) became the clearing house of the London futures exchanges, launched SwapClear in 1999 for the dealers’ interbank swaps, merged with Clearnet of Paris in 2003 and became majority-owned by LSEG in 2013; LCH Ltd in London holds SwapClear, RepoClear (gilts), ForexClear, EquityClear and the listed derivatives, LCH SA in Paris the euro repo, CDSClear and the Paris cash equities.
PAIRS: the Portfolio Approach to Interest Rate Scenarios, SwapClear’s initial margin model, is a filtered historical simulation value-at-risk: ten years of daily yield curve moves scaled to current volatility, applied to the member’s portfolio over a five-day liquidation period (the time to hedge and auction a defaulter’s book), with the add-ons; the CFTC’s and UK EMIR’s minimum of a 99% confidence over five days is the floor.
The CME-LCH basis: the same dollar swap cleared at LCH and at CME trades at different prices because the two pools of positions are not fungible and the margin and the netting differ for the dealers; the basis widened in 2015 and settled since, and the dealers run basis trades between the two; the euro swap at Eurex against LCH has the same basis, which EMIR 3’s active account requirement is meant to move.
The tier 2 recognition: after Brexit ESMA classified LCH Ltd and ICE Clear Europe as tier 2 third-country CCPs (systemically important for the EU) under EMIR 2.2, subject to ESMA’s direct supervision for the EU-facing business, under the Commission’s equivalence decision for the UK CCPs, extended for the third time in January 2025 to June 30, 2028; EMIR 3 (December 2024) added the active account requirement and the ESMA joint monitoring of the clearing moving to the EU.

LSEG›RepoClearInstrument card: Repo

LCH RepoClear: Gilt Repo and Cash Gilts From the Trade to Netting and DVP in CREST, the Sponsored Clearing and the LDI Crisis

LCH Ltd’s gilt service: the repo and cash gilt trades from BrokerTec, Tradeweb and the affirmed bilateral trades registered with the CCP as counterparty, the initial margin on the net positions and the daily mark through the PPS banks, the netting into one delivery per ISIN per settlement date with the balance sheet relief, the delivery-versus-payment settlement in CREST against central bank money, the sponsored clearing that brings the pension, LDI and money funds in behind their sponsors, the September 2022 crisis with its margin calls and the Bank’s intervention, and the Bank of England as supervisor of the CCP and central bank of the gilt market.

Worked example, illustrative:owner LCH Group (LSEG); RepoClear Ltd in London for the gilts since 1999, RepoClear SA in Paris for the euro government bondshandles gilt repo and reverse repo, cash gilts, Treasury bills, £GC; GBP 300,000,000,000 of nominal a day, illustrativemembers the clearing members (the GEMMs, the banks); the sponsored members (pension funds, LDI funds, money funds) through their sponsorslinks CREST for the DVP settlement in central bank money; the PPS banks for the margin; BrokerTec, Tradeweb and the interdealer brokers as trade sources; the triparty agent for £GCoverseen by the Bank of England as a recognized CCP; ESMA as tier 2 for the EU membersthe cycle registration through the day; the margin by the morning PPS deadline; netting for each settlement date; DVP in CREST on T+1 or the same day

RepoClear turns the gilt market’s repo and cash trades into one net delivery per gilt per day in CREST, and the netting is the balance sheet the dealers clear for. The funds come in behind their sponsors, and September 2022 showed what the margin calls do when the gilt market moves a year in a week.

The gilt repo market: the dealers finance their gilt inventories and the funds lend their cash or borrow the gilts they need in repo, GBP 400,000,000,000 or so outstanding (illustrative), traded on BrokerTec, Tradeweb and by voice, mostly overnight and term to a few months, with the LDI funds as the largest borrowers of cash against gilts; the cleared share grew after 2022 with the sponsored model.
The LDI crisis: the pension funds’ liability-driven investment strategies held long gilts and swaps with leverage through repo to match their liabilities; the yield shock of September 2022 (the 30-year gilt from 3.5% to over 5% in days) triggered collateral calls the funds met by selling gilts, which raised yields further; the Bank of England bought GBP 19,000,000,000 of long gilts between September 28 and October 14 to stop the spiral, and the Pensions Regulator set a minimum yield buffer of 250 basis points for the funds in 2023.
Sponsored clearing: the sponsor (a clearing member) brings its client into the CCP as a sponsored member with a limited membership: the sponsor submits the trades, guarantees the performance and margins the client, and the client’s trades net and settle at the CCP; RepoClear launched it in 2017 and the US FICC runs the same model; the Bank of England’s 2024 work on the gilt repo market pushed the LDI funds toward it.
£GC and the triparty: the £GC products let a cash lender receive a basket of gilts allocated by the triparty agent (Euroclear UK and International’s DBV mechanism in CREST) with the CCP between the parties, a general collateral repo cleared and settled without naming the gilts; the term £GC extends it; the UK counterpart of Eurex’s GC Pooling.

LSEG›ForexClearInstrument card: Non-Deliverable Forward

LCH ForexClear: NDFs From the Affirmation to the Fixing, the Deliverable Options Through CLS, the Margin and the Default Fund

LCH Ltd’s FX service: a non-deliverable forward affirmed through Traiana and accepted by the CCP, the novation into the house or client portfolio, the initial margin on the portfolio value-at-risk and the daily variation margin in dollars through the PPS, the NDF fixing settled as a dollar difference, the deliverable options and forwards settled payment versus payment through CLS’s cleared service, a member default handled by hedging and auction, and the Bank of England’s supervision with the CFTC’s registration of a service that grew on the margin and capital rules rather than a mandate.

Worked example, illustrative:owner LCH Group (LSEG); ForexClear launched in 2012 for the NDFs, the deliverable options in 2018handles non-deliverable forwards in the emerging market currencies, G10 deliverable options, forwards and swaps; USD 100,000,000,000 a day, illustrativemembers the FX dealers and the banks as clearing members; the asset managers and hedge funds as clients through themlinks OSTTRA’s Traiana and MarkitServ as affirmation platforms; CLS’s CLSClearedFX for the deliverable settlement; the PPS banks for the margin and the NDF settlementsoverseen by the Bank of England as a recognized CCP; the CFTC as a DCOthe cycle acceptance on T; the margin by the morning PPS deadline; the variation margin daily; the NDF settled at the fixing; the deliverable legs through CLS on the value date

FX was never mandated into clearing, so ForexClear grew on the margin and capital rules that made bilateral FX dear: the NDFs settle as dollar differences at the fixing, and the deliverable products go through CLS so that the clearing house never holds a currency leg alone.

NDFs: a non-deliverable forward is a forward on a currency that cannot be delivered offshore (the rupee, the won, the real, the renminbi, the Taiwan dollar, the peso), settled at the fixing date by the dollar difference between the contract rate and the official reference rate; the market trades in London, Singapore and New York among the dealers and the funds, about USD 300,000,000,000 a day (illustrative), and is the FX product that cleared first because it has one settlement in one currency.
The uncleared margin rules: the initial margin requirement on uncleared derivatives (the BCBS-IOSCO framework, phased in from 2016 to 2022 by the size of the firm) applies to NDFs and FX options but not to the physically settled FX forwards and swaps, so the NDFs and the options moved toward clearing to escape the bilateral margin while the forwards and swaps stayed bilateral; ForexClear’s growth follows the phases.
CLSClearedFX: the settlement service CLS built for the clearing houses in which the CCP is a settlement member and the deliverable legs of the cleared trades settle payment versus payment on CLS’s books with the other FX trades, so that the clearing of deliverable FX does not reintroduce the settlement risk CLS removed; ForexClear’s deliverable options and forwards use it; the liquidity arrangements cover a defaulter’s legs.
The capital rules: SA-CCR (the standardized approach to counterparty credit risk) and the leverage ratio charge the banks for their bilateral FX exposures in a way the cleared and netted exposures reduce, which is the arithmetic behind the dealers’ clearing of NDFs; ForexClear’s FX Smart Clearing service clears the forwards and swaps selectively to optimize the capital, a product that exists only because of the rules.

LSEG›EquityClear

LCH EquityClear: the Cash Equity CCP for the London Venues, Netting, Settlement in CREST and the Interoperability

LCH Ltd’s cash equity service: the trades of the exchange and the MTFs captured at the match and novated under the open offer, the member’s positions by ISIN and settlement date, the margin on the unsettled portfolio through the PPS banks, the netting into one delivery per ISIN per settlement day across the venues, the settlement in CREST on T+2 against central bank money with the European shares through the CSD links, the interoperability that lets each member choose its CCP with the inter-CCP margin across the links, and the Bank of England’s supervision of a service with its own default fund.

Worked example, illustrative:owner LCH Group (LSEG); EquityClear for the London Stock Exchange since 2001, extended to the MTFs and the interoperability since 2008handles cash equities, ETFs and depositary receipts traded on the UK, Swiss and European venues; 2,000,000 trades a day worth GBP 20,000,000,000, illustrativemembers the clearing members (brokers, banks, the general clearing members for the smaller brokers); the investors behind themlinks CREST for the UK settlement on T+2; Euroclear, Clearstream and the national CSDs for the European shares; Cboe Clear Europe and SIX x-clear across the interoperability links; the PPS banksoverseen by the Bank of England as a recognized CCP; ESMA as tier 2 for the EU business; the FCA for the venuesthe cycle capture at the match; the margin by the morning PPS deadline; netting for each settlement date; DVP in CREST on T+2 (T+1 from October 11, 2027)

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EquityClear is one of three clearing houses a London broker can choose, and the choice is what makes the model: a member nets its trades across every venue at the CCP it picked, the CCPs margin each other across the links, and the fees fell to pennies. The settlement is CREST’s, in central bank money.

The open offer: EquityClear becomes the counterparty to both sides at the moment the venue matches the trade (the open offer model) rather than by a later novation, so no bilateral contract ever exists between the members; the US NSCC guarantees from the point of capture, which is the same effect by a different legal route.
Interoperability: under the European Code of Conduct for Clearing and Settlement of 2006 the UK and Swiss venues opened their clearing to competing CCPs, and three interoperate today (LCH EquityClear, Cboe Clear Europe, SIX x-clear) with the inter-CCP margin that protects each from the others’ default; the EU’s exchanges (Euronext, Deutsche Börse) kept their own CCPs, and EMIR’s rules on the inter-CCP links kept the model from spreading.
The general clearing members: a broker that is not a member of the CCP clears through a general clearing member (a bank or a large broker), which carries its trades, margins it and is responsible to the CCP; the retail brokers, the small institutional brokers and the foreign firms reach the CCP this way, as the US introducing brokers reach NSCC through their clearing firms.
Settlement discipline: the UK did not adopt CSDR’s settlement discipline regime, so there are no cash penalties on the fails and no mandatory buy-ins in CREST; the CCP’s rules (the daily mark of the failing position, the buy-in at the CCP’s discretion) and the venues’ rules discipline the fails, and the Accelerated Settlement Taskforce’s T+1 work set the operational standards (the allocations and confirmations on T) the market is adopting for 2027.

LSEG›Tradeweb and FXallInstrument card: FX Spot

Tradeweb, FXall and Matching: the RFQ for Gilts, Credit and Swaps, the FX Platforms and the Handoff to CREST, LCH and CLS

LSEG’s bond and FX venues: a gilt request for quote to five dealers on Tradeweb with the composite price as the yardstick, the quotes in competition within seconds and the confirmation as the legal record with the trade reported to the bond tape, the gilt to CREST on T+1 and the swap to SwapClear and the repo to RepoClear through the straight-through links, a corporate’s FX swap on FXall against its relationship banks, the interbank market on Matching’s order book with the 4pm fix, the FX trade confirmed and settled through CLS, and the FCA’s authorization of the MTFs beside the US and EU entities and the data business.

Worked example, illustrative:owner Tradeweb Markets, listed in New York, majority-owned by LSEG; FXall and Matching part of LSEG since the Refinitiv acquisition of 2021handles gilts, credit, swaps and repo by request for quote and order book; FX spot, forwards and swaps for the buy side, the corporates and the interbank market; GBP 20,000,000,000 of gilts a day on Tradeweb, illustrativemembers the dealers (the GEMMs, the credit desks, the FX banks) as liquidity providers; the asset managers, pension funds, hedge funds and corporates as userslinks CREST for the gilts on T+1; LCH SwapClear and RepoClear for the cleared swaps and repo; CLS for the FX settlement; the bond tape since June 2026overseen by the FCA for the UK MTFs and OTF and for the FX benchmark; the AFM and the CFTC for the EU and US entitiesthe day the RFQ in seconds; the gilts settle T+1; the swap cleared within seconds; FX spot on T+2 through CLS; the 4pm fix

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The buy side trades gilts, credit and swaps by asking several dealers at once and hitting the best, and the corporates and the funds deal their FX the same way; the dealers hedge on the anonymous book where sterling finds its price. The venues match and hand off, and the group that owns them sells the prices they make.

The RFQ model: the dealer-to-client bond and swap markets trade by request for quote, the client asking several dealers at once and dealing on the best, with the venue as the electronic intermediary, the record keeper and the reporter, never the counterparty; the dealer-to-dealer market trades on the interdealer brokers’ order books and voice; the all-to-all protocols (MarketAxess Open Trading, Tradeweb’s) let the buy side quote to each other.
The derivatives trading obligation: UK MiFIR requires the most liquid interest rate swaps (the SONIA, SOFR and €STR overnight index swaps and the fixed-to-float swaps in the standard tenors) and the index CDS to be executed on a UK trading venue, a US SEF or an EU venue under the equivalence decisions, which routed the buy side’s swaps onto Tradeweb and Bloomberg; the clearing follows within seconds through the venues’ links to LCH.
The FX market in London: 38% of the global FX turnover of USD 7,500,000,000,000 a day (BIS 2022) is traded in London, more than New York and the Asian centers together; the interbank spot market runs on the primary venues (Matching for sterling and the Commonwealth currencies, EBS for the euro and the yen) and the banks’ own platforms, the client market on the multi-dealer platforms (FXall, 360T, Bloomberg) and the single-bank portals; the FX Global Code of 2017 is the market’s conduct standard.
The data: LSEG’s Data and Analytics division (the former Refinitiv) sells the terminals, the real-time prices, the reference data and the FX benchmarks that the venues and the markets generate, and FTSE Russell the indexes the funds track; the exchange and the venues are a small part of a group whose revenue is mostly data, which is the shape of the modern exchange group.

ICE in London›ICE Futures EuropeInstrument card: Overnight Rate Future

ICE Futures Europe: Brent, Gasoil, the Rate Futures and the Carbon From the Match to the Settlement Price and Expiry

An airline’s fuel hedge through the London futures exchange: the Brent and gasoil orders through the clearing broker, the match on the ICE platform from 01:00 London with the implied spreads, the block trades and the exchange for physical bringing the OTC positions into the clearing, the novation to ICE Clear Europe with the initial margin, the settlement price in the closing window and the variation margin, the expiry with Brent cash-settled to the index, gasoil delivered in the ARA area and the allowances delivered to the registries, and the FCA’s oversight of the recognized investment exchange with the CFTC’s foreign board of trade registration.

Worked example, illustrative:owner Intercontinental Exchange; the International Petroleum Exchange of 1980 acquired in 2001 and Liffe (NYSE Euronext’s London derivatives exchange) in 2013handles Brent, WTI, gasoil and the oil complex, UK natural gas, the SONIA and Euribor futures, gilt and FTSE 100 futures and options, UK and EU carbon allowances; 3,000,000 contracts a day, illustrativemembers the clearing members of ICE Clear Europe (the FCMs, the banks) and the non-clearing members, brokers and proprietary firms; the hedgers and funds through themlinks ICE Clear Europe for every trade; the ICE Brent Index for the cash settlement; the ARA delivery for gasoil; the UK and Union registries for the allowances; ICE Endex in Amsterdam for the EU gas and carbonoverseen by the FCA as a recognized investment exchange; the CFTC as a foreign board of trade; the carbon rules of the UK and the EUthe day 01:00 to 23:00 London for Brent; the settlement window 19:28 to 19:30; the variation margin in the morning cycle; Brent expires on the last business day of the second month before

ICE Futures Europe is where the world prices Brent crude, gasoil and the carbon allowances, on one platform from the Asian morning to the New York close, with the physical market bringing its positions in through the blocks and the EFPs. Its own clearing house stands behind every trade, and the expiry settles Brent in cash against the physical market’s index.

Brent: the ICE Brent future is the benchmark two thirds of the world’s crude is priced against; the physical Brent market (the dated Brent assessed by Platts from the BFOE cargoes, with WTI Midland added to the basket in 2023) and the forward market feed the ICE Brent Index the future expires against; the spread between the future, the dated and the forward is the oil market’s structure, and the options on the future the volatility market.
The carbon contracts: the EU allowance futures trade on ICE Endex (Amsterdam, a regulated market under the AFM) and the UK allowance futures on ICE Futures Europe since the UK ETS replaced the EU scheme for the UK in 2021; the allowances are delivered into the registry accounts (the Union Registry, the UK Registry) at expiry; the auctions of the allowances by the governments also run on the ICE platforms, and the compliance buyers (the utilities, the industrials) and the funds trade them.
The rate futures: the three-month SONIA future replaced the sterling LIBOR future at the end of 2021 and the three-month Euribor future (the Liffe heritage) trades beside the €STR future; the gilt futures (the long gilt) and the FTSE 100 futures and options complete the sterling complex; the SONIA and Euribor contracts settle in cash to the compounded rate over the quarter, and the asset managers and the banks hedge their rate exposure on them beside the swaps at LCH.
The foreign board of trade: a non-US exchange that gives its US members direct electronic access must register with the CFTC as an FBOT (ICE Futures Europe since 2011) with its clearing house registered as a DCO or exempt; the US members trade the linked contracts (the ICE Brent against the ICE WTI) through the same platform, and the position limits of the two jurisdictions apply to the linked contracts together.

ICE in London›ICE Clear EuropeInstrument card: Overnight Rate Future

ICE Clear Europe: the CCP for ICE Futures Europe and ICE Endex, the Margin, the Twice-Daily Cycle, the Deliveries and the Guarantee Fund

The clearing house of ICE’s London and Amsterdam exchanges: the matched trades captured and novated at the match, the house and client accounts under the segregation models, the initial margin on the risk model and the 2022 energy crisis, the twice-daily cycle with the settlement prices and the variation margin through the assured payment system banks in three currencies, the expiry with the cash settlements and the physical deliveries of gasoil, gas and allowances, the guarantee fund and the waterfall with the CDS service closed in 2023, and the oversight by the Bank of England with the CFTC’s registration and ESMA’s tier 2 recognition.

Worked example, illustrative:owner Intercontinental Exchange; the clearing house since 2008, when ICE left LCH to clear its London contracts itselfhandles the futures and options of ICE Futures Europe and ICE Endex: oil, gas, carbon, the rates and the FTSE; 4,000,000 contracts a day, 60,000,000 open positions, illustrativemembers about 80 clearing members (the FCMs, the banks, the energy traders’ clearers); the hedgers and funds through their client accountslinks the assured payment system banks for the cash in GBP, EUR and USD; the accounts at the Bank of England and the Fed; the ARA delivery, the gas TSOs and the registries; ICE Clear Credit for the CDS since 2023overseen by the Bank of England as a recognized CCP; the CFTC as a DCO; ESMA as tier 2 to June 2028the cycle novation at the match; the settlement prices at each close; the variation margin in the morning cycle; intraday calls; the deliveries at expiry

ICE Clear Europe is the vertical silo behind London’s energy and rates futures: it novates at the match, margins twice a day in three currencies, and stands behind the barges, the gas and the allowances at expiry. The 2022 gas crisis was its stress test, and the CDS business it once cleared went to Chicago in 2023.

The vertical silo in London: ICE Futures Europe cleared at LCH until 2008, when ICE opened ICE Clear Europe and moved its contracts there over a weekend, the first of the London exchanges to take its clearing in house; the LME followed in 2014 with LME Clear and the LSE bought LCH in 2013; the open interest cannot move between clearing houses, so the exchange and its CCP are one business.
The energy crisis of 2022: the TTF gas price rose tenfold and the margin on the gas and power futures with it, so the utilities and the energy traders faced calls of billions a day; the governments (Germany, the UK, the Nordics) extended liquidity to the utilities, the EU let the CCPs accept uncollateralized bank guarantees for a time, and a share of the market moved to bilateral trading to escape the margin; the lesson the regulators drew was about the margin models’ procyclicality.
The assured payment system: ICE Clear Europe collects and pays the margin through the APS banks, a set of commercial banks that hold the members’ accounts and confirm the payments to the clearing house by the morning deadline, under the assured payment agreements that make the confirmation irrevocable; LCH’s protected payments system works the same way; the clearing house keeps its own cash at the Bank of England and the Fed under their policies for the FMIs.
The CDS service: ICE Clear Europe cleared the European index CDS (the iTraxx) and the single names from 2009 under the G20 push to clear the credit derivatives, in competition with LCH SA’s CDSClear; ICE consolidated its CDS clearing at ICE Clear Credit in Chicago in October 2023 and closed the London service, which left LCH SA in Paris as the European CDS clearing house.

LME›LMEInstrument card: Base Metals

The London Metal Exchange: the Ring, LMEselect, the Prompt Dates, the Warrants and the Nickel Day of 2022

A copper producer’s hedge through the London Metal Exchange: the forward sale for a prompt date three months out through a Category 1 or 2 member, the three markets of the ring, LMEselect and the inter-office telephone market, the official prices discovered in the ring and the closing prices from the electronic windows, the novation to LME Clear with the margin across the prompt dates, the delivery by LME warrant in a licensed warehouse through LMEsword or the carry to a later prompt, the nickel suspension of March 2022 with the cancelled trades and the reforms since, and the FCA’s oversight of the recognized investment exchange owned by HKEX.

Worked example, illustrative:owner Hong Kong Exchanges and Clearing since 2012; the exchange of 1877, member-owned until thenhandles copper, aluminum, zinc, nickel, lead, tin, the alloys, the steel, cobalt and lithium cash-settled contracts; 600,000 lots a day worth USD 60,000,000,000, illustrativemembers nine Category 1 ring-dealing members; the Category 2 associate broker clearing members; the producers, consumers, merchants and funds through themlinks LME Clear for every trade; the licensed warehouses and the LMEsword warrants for the delivery; LMEsmart for the matching; the physical market pricing off the official pricesoverseen by the FCA as a recognized investment exchange; the Bank of England for LME Clearthe day LMEselect 01:00 to 19:00 London; the ring sessions from 11:40; the official prices from the second ring; the closing prices from the electronic windows; the inter-office market around the clock

The LME prices the world’s metals on forward contracts with a delivery date for every business day, discovered in the last open-outcry ring in Europe, on a screen and by telephone, with the metal itself sitting in licensed warehouses behind the warrants. The nickel day of 2022 tested the model, and the reforms since are the answer.

The prompt dates: an LME contract is a forward for delivery on a prompt date rather than a future for a delivery month: daily prompts to three months, weekly to six months, monthly beyond, with the three-month contract as the most liquid; a hedger matches its physical shipment to the day and a trader carries a position from one prompt to another; the margin and the clearing run across the whole prompt-date structure, which is what makes LME Clear’s model unlike the futures CCPs.
The warrants and the warehouses: an LME warrant is the document of title to one lot of an approved brand in a licensed warehouse, held electronically on LMEsword and transferred on the prompt date; the exchange licenses the warehouses (over 400 in 30 or so locations, illustrative) and sets the rent and the load-out rates after the queues of 2013, when the warehouse companies owned by the banks and traders held the aluminum for a year; the stocks reports are the physical market’s barometer.
The nickel day: on March 7 and 8, 2022 the nickel price rose from USD 30,000 to over USD 100,000 a tonne on the squeeze of a short position of about 150,000 tonnes held by Tsingshan through several members and in the OTC market the exchange could not see; the exchange suspended the market at 08:15 on March 8 and cancelled the trades since midnight, then reopened a week later with price limits; the Court of Appeal upheld the cancellation in 2024, the FCA’s penalty of 2025 was the first against a UK exchange, and the Bank of England reviewed LME Clear’s handling of the margin calls.
Hong Kong Exchanges and Clearing: HKEX bought the member-owned LME in 2012 to connect the Chinese metal demand to the London price; the LME’s Hong Kong warehouses opened in 2025 after a decade of waiting for the mainland’s; the exchange’s fees, the ring’s future and the electronic closing prices are the issues between HKEX, the members and the physical market since.

LME›LME ClearInstrument card: Base Metals

LME Clear: the CCP of the Metals Exchange, the Margin on the Prompt Dates, the Warrants as Collateral and the Default Fund

The LME’s clearing house: the ring, LMEselect and inter-office trades matched through LMEsmart and registered with the CCP as counterparty across the prompt-date structure, the house and client accounts with the OTC positions reported beside them, the initial margin across the prompt dates with the metal itself accepted as collateral, the daily variation margin on the closing prices with the forward’s settlement at the prompt, the delivery of the warrants versus payment through LMEsword on the prompt date, the default fund and the waterfall tested by the nickel day, and the Bank of England’s supervision of the recognized CCP with its review after 2022.

Worked example, illustrative:owner the London Metal Exchange (HKEX); LME Clear opened in September 2014, taking the clearing from LCHhandles the LME’s forward and option contracts in the base metals and the cash-settled contracts; 600,000 lots a day, USD 15,000,000,000 of initial margin, illustrativemembers the clearing members (the Category 1 and 2 members, the banks); the producers, merchants and funds in their client accountslinks the settlement banks for the margin and the cash in USD, GBP, EUR and JPY; LMEsword and the warehouses for the delivery; LMEsmart for the matching; the custodians for the collateraloverseen by the Bank of England as a recognized CCP; ESMA as tier 1 for the EU membersthe cycle registration at the match or through LMEsmart; the margin by the morning deadline; the variation margin daily on the closing prices; delivery versus payment on each prompt date

LME Clear margins a forward structure with a delivery date for every day and takes the metal itself as collateral, which no other clearing house does. The nickel day of 2022 was the stress its model and its governance were measured by, and the Bank of England’s review set the remediation.

LME Clear: the LME cleared at LCH from 1987 (the tin crisis of 1985, when the International Tin Council defaulted and the exchange had no clearing house, was the reason) until 2014, when it opened its own clearing house under HKEX; LME Clear is a recognized CCP with its own default fund, its own risk model and the exchange’s warrants as eligible collateral, a feature no other CCP offers.
Margin across the prompts: a member’s portfolio holds positions on many prompt dates in several metals, and the margin model nets the outrights and charges the spreads between the dates (the carries), so the margin is a portfolio figure rather than a per-contract one; the contingent variation margin, settled at the prompt rather than daily for the house positions, is the structure the futures CCPs do not have and that the clearing house has been moving away from since 2022.
The nickel day at the clearing house: on March 8, 2022 the margin calls on the nickel positions at the morning’s prices would have exceeded what several members could pay within the deadline, and the exchange cancelled the day’s trades rather than declare the defaults; the Bank of England’s review of 2023 found weaknesses in LME Clear’s governance, risk management and margin arrangements and required an independent review and remediation, and the exchange and the clearing house rewrote their emergency powers and their price limits.
Tier 1: ESMA classifies the third-country CCPs as tier 1 (not systemically important for the EU) or tier 2 (systemically important, under ESMA’s direct supervision); LME Clear is tier 1 and LCH Ltd and ICE Clear Europe tier 2 under the UK equivalence decision extended to June 2028; the EU members of LME Clear clear under the recognition, and the metals’ euro business is small beside the dollars.

Euroclear UK and International›CRESTInstrument card: Treasury Bill

CREST: the UK CSD, Real-Time DVP in Central Bank Money, the Registers and the Legal Title, the Stamp Duty, the Gilts and T+1

The UK central securities depository’s settlement day: the instructions from the brokers, the custodians and the CCPs matched, the real-time delivery-versus-payment settlement with the queue and the priorities and no CSDR penalties, the cash in central bank money through the settlement banks’ earmarked funds in RTGS and the self-collateralising repos, the registrars updating the legal title within two hours, the stamp duty reserve tax collected on each purchase with the dividends and corporate actions flowing back, the gilts and the money market instruments with the DMO’s issuance and the delivery by value collateral, and the Bank of England’s supervision under UK CSDR with T+1 on October 11, 2027.

Worked example, illustrative:owner Euroclear SA/NV (Brussels), user-owned through the Euroclear group; Euroclear UK and International since 2002, CRESTCo since 1996handles UK and Irish shares, gilts, Treasury bills, CDs and CP, ETFs, international securities through the links; 1,000,000 transactions a day worth GBP 1,000,000,000,000, illustrativemembers the CREST members (custodians, brokers, the CCPs, the Bank of England); the settlement banks paying for them; the registrars on the issuers’ sidelinks the Bank of England’s RTGS for the sterling cash in central bank money; the registrars for the legal title; LCH EquityClear and RepoClear for the net deliveries; Euroclear Bank for the international securities; HMRC for the stamp dutyoverseen by the Bank of England as a recognized CSD under UK CSDR and as a recognized payment system; the FCA for the conductthe cycle instructions matched on T; the shares settle T+2 (T+1 from October 11, 2027); the gilts T+1; real-time DVP through the settlement day; the registers within two hours

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CREST settles the UK market’s shares and gilts in real time against central bank money, and the buyer’s name goes on the issuer’s register within two hours, with the stamp duty collected on the way. The CCPs net into it, the DMO issues into it, and the Bank of England runs the cash underneath.

Legal title: the UK settlement system registers the CREST member as the legal holder on the issuer’s register (the electronic transfer of title since 2001), unlike the US model where every share is registered to DTC’s nominee; the investors hold through the nominee companies of their brokers and custodians, so the register shows the nominees, and the Digitisation Taskforce (the Flint review of 2025) proposed to end the paper certificates and to let the issuers see through the nominees to the beneficial owners.
Central bank money: since 2001 the sterling cash leg of CREST settles in central bank money: the settlement banks earmark funds in the Bank of England’s RTGS for CREST, the high-frequency cycles move the net positions between the banks’ accounts through the day, and the Bank lends the banks intraday liquidity against the securities being settled through the self-collateralising repos; the model is DVP in central bank money without a separate payment system, the counterpart of T2S’s dedicated cash accounts.
The stamp duty: the 0.5% stamp duty reserve tax on the purchase of UK shares is the oldest tax on securities (the stamp duty of 1694) and the one CREST made automatic: the depository computes it on each settlement from the price and the flags and collects it from the buyer’s settlement bank for HMRC, about GBP 3,000,000,000 a year (illustrative); the exemptions (AIM, ETFs, the market makers’ relief, the growth market exemption) are where the policy debate sits.
T+1: the Accelerated Settlement Taskforce recommended in 2024 that the UK move to T+1 on October 11, 2027, and the EU and Switzerland chose the same date in 2025; the technical group’s code of conduct sets the operational standards (the allocations and confirmations on T, the standing settlement instructions, the stock loan recalls) the market adopts for it; CREST itself settles in real time and the change is in the market’s timetable before it.

The Gilt and OTC Venues›The Gilt AuctionsInstrument card: Treasury Bill

The DMO’s Gilt Auctions: the Remit, the Bid-Price Auction, the Syndications, the Settlement in CREST and the GEMMs’ Secondary Market

The primary market of the gilts: the Treasury’s remit and the DMO’s calendar after the quarterly consultations, the GEMMs’ competitive and non-competitive bids on the Bloomberg Auction System by 10:00, the result with the allotment, the cover and the tail and the post-auction option, the syndications for the long and index-linked gilts with four GEMMs as lead managers, the settlement on T+1 in CREST against the cash to the Debt Management Account at the Bank of England, the secondary market the GEMMs make with the interdealer brokers, Tradeweb and the Bank’s APF sales, and the DMO as HM Treasury’s agency with the FCA regulating the GEMMs.

Worked example, illustrative:owner HM Treasury, through the Debt Management Office, an executive agency since 1998handles the issuance of the gilts (conventional and index-linked) and the Treasury bills by auction, syndication and tender; about GBP 300,000,000,000 of gilts a year, illustrativemembers about 18 gilt-edged market makers with the obligation to bid and to make markets; the investors through them; the retail purchase and sale service besidelinks the Bloomberg Auction System and Btender for the bids; CREST for the settlement on T+1; the Debt Management Account at the Bank of England for the cash; Tradeweb and the IDBs for the secondary market; the APF for the Bank’s salesoverseen by HM Treasury as the parent department; the FCA for the GEMMs and the venues; the Bank of England as the market’s central bankthe cycle the calendar a quarter ahead; the bids by 10:00 on the auction day; the result by 10:30; the post-auction option to 14:30; settlement T+1

Every gilt starts at a DMO auction, where the gilt-edged market makers bid by 10:00 for themselves and their clients and the result at 10:30 tells the market how much the government’s debt is wanted. The syndications sell the long and the index-linked in a morning, and it all settles into CREST against central bank money the next day.

The GEMMs: the gilt-edged market makers are the primary dealers of the gilt market, appointed by the DMO (about 18, the large banks’ London desks) with the obligations to bid at every auction, to make continuous two-way prices to the investors and to report their positions, and the privileges of the exclusive access to the auctions, the interdealer broker screens and the DMO’s repo facility; the index-linked GEMMs are a subset; the US primary dealers are the counterpart.
The bid-price auction: the conventional gilt auctions are multiple-price, each successful bidder paying the price it bid, which rewards the aggressive bids and punishes the winner’s curse, while the index-linked auctions are uniform-price since 1998; the cover ratio and the tail are the demand signals, and the post-auction option facility (the right to buy up to 15% more at the average price until 14:30) was added in 2009 to help the GEMMs absorb the larger auctions of the crisis years.
Syndication: the DMO sells the long-dated and index-linked gilts, where the demand is concentrated in the pension and insurance funds, by syndication through four GEMMs as joint lead managers, with the book built in a morning at a spread to a reference gilt; the syndications of 2020 to 2024 raised GBP 10,000,000,000 and more in a day each and the program sells about a fifth of the year’s issuance; the mini-tenders sell smaller amounts of the existing gilts on short notice.
The Bank of England beside the DMO: the Bank bought GBP 875,000,000,000 of gilts under quantitative easing (the Asset Purchase Facility) from 2009 to 2021 and has been selling them and letting them mature since 2022 (quantitative tightening, GBP 100,000,000,000 a year, illustrative), so the gilt market absorbs the DMO’s issuance and the Bank’s sales together; the Bank is also the DMO’s banker (the Debt Management Account) and the market’s lender through the short-term repo.

The Gilt and OTC Venues›The OTC VenuesInstrument card: Swaption

The OTC Venues: the Swap RFQ Under the Trading Obligation, the Interdealer OTFs, the Straight-Through Clearing, the Repositories and the Bond Tape

The swap and bond venues of London: a SONIA swap request for quote to four dealers on Bloomberg’s MTF under the derivatives trading obligation, the quotes and the venue’s confirmation with the pre-trade clearing certainty, the swap sent to SwapClear within seconds through the straight-through link, the interdealer market on TP ICAP’s and the other brokers’ OTFs and MTFs by voice, hybrid and order book, the reports to the UK trade repositories under UK EMIR and to the APAs and the bond consolidated tape, the corporate bond market by RFQ, all-to-all and portfolio trade, and the FCA’s authorization of the venues with the Bank supervising the CCPs behind them.

Worked example, illustrative:owner TP ICAP, BGC and Tradition (the interdealer brokers, listed); Tradeweb (LSEG-controlled), Bloomberg (private), MarketAxess (listed) for the dealer-to-client platformshandles interest rate and inflation swaps, credit indexes, government, corporate and emerging market bonds, repo; USD 2,000,000,000,000 of swaps a day across the London venues, illustrativemembers the swap dealers and the bond desks as liquidity providers; the asset managers, pension funds, hedge funds and corporates as clients; the interdealer brokers’ deskslinks LCH SwapClear (CME, Eurex) for the cleared swaps within seconds; the UK trade repositories; the APAs and the bond tape since June 2026; CREST and the ICSDs for the bonds; Markitwire for the uncleared confirmationsoverseen by the FCA for the MTFs and OTFs, the trading obligation and the transparency; the Bank of England for the CCPsthe cycle the RFQ in seconds; the clearing within seconds; the public report in real time with the deferrals; the repository report by T+1; the bonds settle T+1

The buy side asks several dealers at once and hits the best, the dealers hedge with each other through the brokers by voice and screen, and the swap is in the clearing house before the confirmation is read. The venues are the FCA’s, the clearing house is the Bank’s, and the repositories and the tape keep the record.

MTFs and OTFs: UK MiFID’s two categories of multilateral venue beside the exchanges: the multilateral trading facility matches by non-discretionary rules (the order books, the RFQ systems) and the organized trading facility, created for the bond and derivative markets, lets the operator exercise discretion in matching (the voice and hybrid broking of the interdealer brokers); the systematic internaliser, a dealer trading on its own account against its clients, is the bilateral alternative.
The trading obligation: the G20’s 2009 commitment to trade the standardized derivatives on venues became the SEF rules in the US (2013) and the derivatives trading obligation in the EU and the UK (2018); the UK’s obligation covers the overnight index swaps on SONIA, SOFR and €STR and the fixed-to-float swaps in the standard tenors and the iTraxx indexes, and the FCA recognizes the US SEFs and the EU venues as equivalent so that a UK firm can trade there; the clearing obligation under UK EMIR sits behind it.
The trade repositories: UK EMIR requires both counterparties to report every derivative (exchange-traded and OTC) to a UK-registered trade repository by the next business day, with the lifecycle events and the daily valuations; the UK EMIR Refit of September 30, 2024 aligned the data with the global unique transaction and product identifiers and the critical data elements, as the EU did in April 2024 and the CFTC in 2022; the FCA and the Bank read the repositories for the market’s exposures.
The bond tape: the FCA selected Etrading Software (ETS Connect UK) in 2025 as the UK’s bond consolidated tape provider after a tender, and the tape went live on June 22, 2026 with every bond trade reported by the UK venues and APAs in one real-time stream; the EU’s bond tape (fairCT, led by Ediphy) was selected by ESMA in 2025; the UK equity tape is the FCA’s next design, and the transparency regime for bonds and derivatives was rewritten in December 2025 to feed the tape.

The Bank of England›RTGS and the AccountsInstrument card: Overnight Loan

The Bank of England’s RTGS: the Reserves and Settlement Accounts, RT2, CHAPS and CREST Through It, the Retail Net Settlements and the Liquidity

The sterling settlement layer: the reserves and settlement accounts on the Bank of England’s core ledger renewed as RT2 in April 2025, a CHAPS payment settled gross and final, CREST’s delivery versus payment through the high-frequency cycles and the settlement banks’ earmarked liquidity, the retail systems’ net settlements in windows under the prefunded model with the omnibus accounts beside, the liquidity through the reserves at Bank Rate and the Sterling Monetary Framework, the day from 06:00 to 18:00 and the 01:30 opening planned from 2027, and the Bank as operator overseen by its own FMI supervision with HM Treasury’s recognition orders.

Worked example, illustrative:owner the Bank of England, which operates RTGS and CHAPS; RTGS since 1996, CHAPS taken in house in 2017, RT2 live April 28, 2025handles the sterling settlement in central bank money: CHAPS gross, CREST’s DVP, the retail systems’ net positions; GBP 800,000,000,000 a day across RTGS, illustrativemembers about 70 account holders: the banks and building societies, the non-bank PSPs since 2018, the FMIs (CLS, LCH, Euroclear UK and International); the indirect participants through themlinks CHAPS on the same ledger; CREST through the settlement banks’ cycles; Bacs, Faster Payments, LINK and the card schemes for the net settlements; CLS for the sterling pay-ins; the CCPs’ payment banksoverseen by the Bank’s own FMI supervision under the CPMI-IOSCO principles; HM Treasury for the recognition of the systemsthe day CHAPS 06:00 to 18:00; the retail settlement windows; operational near 23 hours; the 01:30 CHAPS opening no earlier than 2027

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Every sterling payment that matters ends as a book entry on an account at the Bank of England, and RTGS is that ledger: CHAPS settles on it gross, CREST through it against the securities, and the retail systems across it in windows. Renewed in 2025 and opening earlier from 2027, it is the floor the sterling market stands on.

RT2: the Bank’s RTGS renewal program, launched in 2017 after the 2014 outage and the consultation on the future of the service, delivered the new core ledger on April 28, 2025 (the ISO 20022 messaging for CHAPS had come in June 2023): a modular system with API access, the synchronisation interface for the settlement of other ledgers against central bank money, and the capacity for near 24-hour operation; the National Audit Office’s 2025 report reviewed the program’s cost and timetable.
The Sterling Monetary Framework: the Bank’s operations with the banks and the designated firms: the reserves accounts remunerated at Bank Rate (the floor system since 2009), the weekly short-term repo lending reserves for a week at Bank Rate against level A collateral without limit (the ordinary source of reserves as quantitative tightening removes them), the indexed long-term repo, the Discount Window Facility for a firm in stress, and the intraday liquidity for the payment systems; the preferred minimum range of reserves is the Bank’s estimate of what the system needs.
The omnibus accounts: since 2021 a regulated payment system operator can hold an omnibus account at the Bank in which its participants’ funds are pooled so that it can settle on its own ledger in central bank money, the model built for the tokenized settlement systems; the sterling Fnality payment system, recognized by HM Treasury, holds the first one; the non-bank PSPs’ settlement accounts (since 2018) and the possible safeguarding accounts for their client funds are the other widening of the access.
The recognized payment systems: HM Treasury recognises under the Banking Act 2009 the payment systems whose failure would threaten the stability of the financial system, which brings them under the Bank of England’s supervision (the CPMI-IOSCO principles, the Bank’s codes of practice): CHAPS, Bacs, Faster Payments, CLS, LINK, Visa Europe, Mastercard, CREST’s embedded payment arrangements and the sterling Fnality system; the Payment Systems Regulator regulates the same systems for competition and innovation, and is being folded into the FCA.

The Bank of England›CHAPSInstrument card: Overnight Loan

CHAPS: the Sterling High-Value System the Bank Runs, a House Purchase, Settlement on the Accounts, the FMIs’ Sterling and the Day From 06:00 to 18:00

The sterling high-value payment system: a house completion and a corporate supplier payment formatted in ISO 20022 and sent by the bank, the settlement at once on the RTGS settlement accounts with the Bank’s intraday liquidity and the liquidity-saving mechanism, the receiving participant crediting the payee under the throughput rules, the FMIs’ sterling flowing through it (CLS’s pay-ins, the CCPs’ margin, the CREST liquidity), the day from 06:00 to 18:00 with the 01:30 opening planned from 2027, the direct access widened to the non-bank PSPs and the FMIs with the de-tiering, and the Bank as operator since 2017 under its own FMI supervision with the PSR and HM Treasury.

Worked example, illustrative:owner the Bank of England, operator since November 2017 (the banks’ CHAPS Co before, the Clearing House Automated Payment System since 1984)handles sterling high-value and time-critical payments in central bank money, final on settlement; 200,000 a day worth GBP 400,000,000,000, illustrativemembers about 40 direct participants (the banks, building societies, non-bank PSPs, the FMIs); some 5,000 indirect participants through the agent banks, illustrativelinks RTGS for the settlement; CLS for the sterling pay-ins and pay-outs; the CCPs’ payment banks; the CREST settlement banks; the retail systems’ prefundingoverseen by the Bank’s own FMI supervision as a recognized payment system; the PSR as economic regulator, folding into the FCA; HM Treasury for the recognitionthe day 06:00 open; the throughput of 50% by 12:00 and 75% by 14:30; 18:00 close; the 01:30 opening no earlier than 2027

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CHAPS is the central bank running the high-value system on its own ledger: a payment settles the moment it arrives, final, against the sender’s reserves or the liquidity the Bank lends against collateral, and the throughput rules keep the day flowing. Everything from a house completion to CLS’s sterling passes through it.

The move into the Bank: CHAPS was run by CHAPS Clearing Company, owned by its bank members, until November 2017, when the Bank of England took direct responsibility for the system and its rules as part of the RTGS renewal, to strengthen the resilience, to widen the access and to end the conflict of a member-owned operator setting the access terms; the Bank now operates, supervises and sets the policy for the system, with the separation of the functions inside it.
Liquidity: a CHAPS participant settles gross from its settlement account, so it needs the balance when the payment is sent; the Bank supplies intraday liquidity free of charge against collateral (the intraday repos, automatically reversed at the end of the day) and the liquidity-saving mechanism of 2013 lets the participants queue payments and have the system offset them bilaterally and multilaterally, cutting the liquidity each payment needs; the Fed’s uncollateralised daylight overdraft is the model the Bank does not use.
ISO 20022: CHAPS moved to the ISO 20022 message standard in June 2023 (the pacs.008 customer payment, the pacs.009 bank payment, the camt statements), ahead of Fedwire (July 2025) and with T2 (March 2023), and the Bank phases in the enhanced data (the purpose codes, the legal entity identifiers, the structured addresses) from 2025 so that the richer data serves the sanctions screening, the fraud controls and the reconciliation; the Bank’s policy is that the structured data becomes mandatory in stages.
The extended hours: the Bank consulted in July 2025 on opening CHAPS settlement at 01:30 no earlier than 2027 (the Asian morning, the CLS window, the cross-border payments) as the first step, with the evening and bank holiday settlement to follow in a second policy statement in 2026, toward near 24-hour operation around the turn of the decade; the Fed’s proposal for Fedwire to run 22 hours seven days a week by 2027 and the instant rails’ continuous operation are the context.

Pay.UK›Bacs

Bacs: the Three-Day Cycle, Direct Credit and Direct Debit, the Net Settlement at the Bank on Day Three and the Renewal

Pay.UK’s bulk payment system: the payroll and the Direct Debit collection files submitted through Bacstel-IP on day one, the sorting and the delivery to the receiving banks on day two with the returns, the multilateral net settlement across the accounts at the Bank of England on day three under the prefunded model with the credits and debits posted, the Direct Debit Guarantee, the indemnity claims and the account switching, Pay.UK’s scheme with the participants, the sponsors, the service users and the Vocalink infrastructure, the renewal redesigned by the Payments Forward Plan of 2026, and the oversight by the PSR, the Bank of England and the FCA.

Worked example, illustrative:owner Pay.UK, the retail payments operator formed in 2018 from the Bacs, Faster Payments and cheque companies, owned by its guarantor members; Bacs since 1968handles Direct Credits (salaries, pensions, benefits, supplier payments) and Direct Debits (bills, subscriptions); 6,500,000,000 payments a year worth GBP 5,000,000,000,000, illustrativemembers about 30 direct participants (the banks and building societies); the sponsoring banks; some 100,000 service users and the accredited bureaux, illustrativelinks the Bank of England’s RTGS for the net settlement on day three with the prefunded collateral; Vocalink as the central infrastructure; the Current Account Switch Serviceoverseen by the PSR as economic regulator (folding into the FCA); the Bank of England as a recognized payment system; the FCA for the banks and payment firmsthe cycle input by 22:30 on day one; processing overnight and delivery on day two; settlement at the Bank and posting on day three

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Bacs pays the country’s salaries and collects its bills on a timetable from 1968: in on day one, sorted on day two, settled net at the Bank of England and posted on day three, with cash prefunded so that no bank’s failure can leave the others short. The renewal meant to replace it has been redesigned twice.

Pay.UK: the operator of the UK’s retail payment systems (Bacs, Faster Payments, the Image Clearing System for cheques, the Current Account Switch Service) formed in 2018 as the New Payment System Operator by merging the scheme companies, a company limited by guarantee owned by its members and funded by the participants; the central infrastructure is run by Vocalink, the former bank-owned utility bought by Mastercard in 2017, under contract.
The prefunded settlement model: since 2015 the participants of Bacs and Faster Payments hold cash at the Bank of England in collateral accounts that fully cover their net sender caps (the maximum net debit they may run between settlements), so that a participant’s failure cannot leave the system short and the loss-sharing among the survivors that the old model relied on is gone; the model is the UK’s answer to the settlement risk of deferred net settlement.
Direct Debit: the UK’s pull payment of 1964, in which an originator with a sponsoring bank collects variable amounts from a payer’s account under an instruction the payer gave once, protected by the Direct Debit Guarantee (an immediate refund of any payment made in error, which the bank recovers from the originator); the bills, the subscriptions, the mortgages and the tax run on it; the AUDDIS, ADDACS and ARUDD messages manage the instructions and the returns.
The renewal: Pay.UK’s New Payments Architecture (2017) was to replace Bacs and Faster Payments with one ISO 20022 clearing and settlement layer; the program’s cost and delays led the PSR to narrow it in 2021 and HM Treasury’s National Payments Vision (November 2024) to reset it; the Payments Forward Plan (February 26, 2026) put the next generation under an industry-led delivery company (the Interbank Infrastructure Renewal) with the Payments Vision Delivery Committee of HM Treasury, the Bank, the FCA and the PSR steering it, and left Pay.UK to run the existing systems.

Pay.UK›Faster Payments

Faster Payments: the Credits in Seconds Around the Clock, the Prefunded Settlement Three Times a Day, the APP Fraud Reimbursement and the Access

Pay.UK’s near-real-time system: a payment from a banking app on a Saturday night with the Confirmation of Payee check and the fraud controls, the clearing in seconds through the central infrastructure to the receiving participant with the payee credited at once, the multilateral net settlement three times a day across the prefunded accounts at the Bank of England, the authorised push payment fraud reimbursement regime since October 2024, the access widened to the non-bank PSPs, the aggregators and the corporates, the renewal under the Payments Forward Plan of 2026, and the oversight by the PSR, the Bank of England and the FCA with Pay.UK and Vocalink running it.

Worked example, illustrative:owner Pay.UK as the scheme operator since 2018 (the Faster Payments Scheme Limited of 2008 before); Vocalink (Mastercard) as the central infrastructure under contracthandles single immediate payments, forward-dated and standing orders, bulk and corporate files, up to GBP 1,000,000 a payment; 15,000,000 a day worth GBP 15,000,000,000, illustrativemembers about 40 direct participants (banks, building societies, non-bank PSPs); some 400 indirect participants through the agency banks and aggregators; the corporates through direct corporate access, illustrativelinks the Bank of England’s RTGS for the prefunded net settlement three times a day; Confirmation of Payee; the open banking APIs; the Current Account Switch Serviceoverseen by the PSR as economic regulator with the reimbursement regime (folding into the FCA); the Bank of England as a recognized payment system; the FCA for the payment firmsthe cycle clearing in seconds, 24 hours a day, every day; settlement in three cycles a working day; the reimbursement within five business days

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Faster Payments gave the UK instant payments in 2008 and the fraud that comes with them: the payee is credited in seconds around the clock, the banks settle three times a day against cash prefunded at the Bank of England, and since 2024 the banks at both ends repay the victims of the scams the speed made possible.

Faster Payments: launched in May 2008 after the Office of Fair Trading’s push for faster clearing, the first of the large economies’ instant rails, run on Vocalink’s infrastructure with the messages of the time (not ISO 20022) and settled in deferred net batches at the Bank of England (three cycles a day since the prefunding of 2015); the limit per payment rose from GBP 10,000 at launch to GBP 1,000,000 in 2022, and the volume grew to 5,000,000,000 payments a year (illustrative).
APP fraud: an authorised push payment scam tricks the victim into paying a fraudster’s account by the victim’s own instruction, so the payment is authorised and the old liability rules left the victim with the loss; after the voluntary code of 2019 the PSR made the reimbursement mandatory from October 7, 2024 (the Financial Services and Markets Act 2023 gave it the power): the sending and the receiving firms split the cost half each, up to GBP 85,000 a claim (the FSCS limit, lowered from the GBP 415,000 first proposed), within five business days.
Confirmation of Payee: the name-checking service that tells the payer whether the name entered matches the account holder before the payment is sent, introduced by the largest banks in 2020 under a PSR direction and extended to all the payment firms with the FPS and CHAPS access by October 2024, the first line of defense against the misdirected and the fraudulent payments; the open banking payment initiation (the Pay by Bank flows) uses the same rail with the bank’s API.
The comparison: the US got its instant rails a decade later (RTP in 2017, FedNow in 2023) and settles them gross on the Fed’s accounts or in a prefunded joint account, the euro area’s TIPS (2018) settles instantly on the ECB’s platform, and India’s UPI and Brazil’s Pix carry far larger volumes; the UK’s deferred net settlement with prefunding is the older model, and the renewal’s question is whether the next generation settles gross in real time at the Bank.

The Other Equity Venues›Cboe UK

Cboe UK: the Two Lit Books, the Periodic Auctions, BIDS for the Blocks, Cboe Clear Europe and the Interoperability

Cboe Europe’s London venues: the parent order sliced across the venues by the broker’s router, the two lit books with their fee models and the market makers, the periodic auctions of up to 100 milliseconds that replaced much of the dark flow, the BIDS block platform for the buy side’s conditional orders under the large-in-scale waiver, the trade to Cboe Clear Europe in Amsterdam or the member’s preferred CCP under interoperability with the settlement in CREST and the European CSDs, the trade reports and the equity tape the FCA is designing, and the FCA’s oversight of the recognized investment exchange with the Dutch authorities for Amsterdam.

Worked example, illustrative:owner Cboe Global Markets (Chicago), which bought Bats Global Markets and with it BATS Chi-X Europe in 2017, EuroCCP in 2020 and BIDS Trading in 2020handles UK and Swiss equities and ETFs in London (the EEA shares in Amsterdam): the lit books, the periodic auctions, the blocks; GBP 10,000,000,000 a day across the UK books, illustrativemembers the member brokers and banks; the electronic market makers; the asset managers through the brokers and on BIDSlinks Cboe Clear Europe as the default CCP; LCH EquityClear and SIX x-clear across the interoperability links; CREST and the European CSDs for the settlement; the APAs and the data feedsoverseen by the FCA as a recognized investment exchange; the AFM and the DNB for the Amsterdam venue and the CCP; the Bank of England recognising the CCPthe day the books with the exchange’s hours, 08:00 to 16:30; the periodic auctions through the day; the trades to the CCP at the match; CREST on T+2

Cboe UK is the exchange’s largest competitor: two lit books, a periodic auctions book that took the flow the dark caps displaced, and a block platform where the buy side meets under the large-in-scale waiver, all in the same shares. It matches and hands off to a CCP of the member’s choice, its own in Amsterdam by default.

Chi-X and BATS: Chi-X Europe (2007) and BATS Europe (2008) were the MTFs that broke the exchanges’ monopolies after MiFID I opened the European equity markets to competition in 2007; they merged in 2011 as BATS Chi-X Europe, became a recognized investment exchange in 2013, were bought by Cboe in 2017 and moved their EEA business to Amsterdam in 2021; the two books kept their separate fee models for the brokers that prefer one or the other.
The periodic auctions: a frequent batch auction book matches orders in short auctions (up to 100 milliseconds on Cboe’s) at a single price within a collar around the European best bid and offer, publishing the indicative price and volume but not the orders; after MiFID II’s double volume cap limited the dark trading in 2018 the periodic auctions took much of that flow as a lit alternative with little information leakage, and ESMA and the FCA reviewed whether they were dark trading by another name.
Cboe Clear Europe: the Amsterdam CCP began as EuroCCP (2008), the user-owned clearing house of the pan-European MTFs, was bought by Cboe in 2020 and renamed in 2022; it clears the most pan-European cash equity trades of any CCP, interoperates with LCH EquityClear and SIX x-clear, and launched the clearing of securities financing transactions and of Cboe Europe Derivatives’ contracts; the DNB and the AFM supervise it and the Bank of England recognises it for the UK trades.
The equity tape: the UK has no consolidated tape for equities; the FCA’s bond tape went live in June 2026 and the equity tape is the next tender, with the question of whether it carries pre-trade data; in the EU the equities tape provider is being selected under the 2024 MiFIR review, with a venue consortium among the bidders; meanwhile each venue and each firm builds its own view of the European best bid and offer from the exchanges’ and the MTFs’ feeds, which is the reference the periodic auctions and the dark books use.

The Other Equity Venues›Aquis

Aquis: the Subscription-Priced MTF With No Aggressive Proprietary Trading, the Aquis Stock Exchange and the SIX Acquisition

The London MTF with a different model: an institutional order routed to Aquis for its fill rates, the lit book under the subscription pricing with no fee per trade and the market at close, the rule that keeps the proprietary firms from taking liquidity with the market makers’ scheme, the Aquis Stock Exchange growth market with its Access and Apex segments and the corporate advisers, the trades to the CCP of the member’s choice with the settlement in CREST, SIX’s acquisition completed on July 1, 2025 to build a pan-European exchange, and the FCA’s oversight of the MTF and the recognized investment exchange with the AMF for Paris.

Worked example, illustrative:owner SIX Group (Zurich), owner of the Swiss and Spanish exchanges, since July 1, 2025; founded in 2013 by Alasdair Haynes and listed on AIM until the acquisitionhandles UK, Swiss and (from Paris) EEA equities on the lit book, the market at close and the auction on demand; the listings of the Aquis Stock Exchange; GBP 1,500,000,000 a day, illustrativemembers the member brokers and banks; the market makers under the scheme; the proprietary firms as posters only; the growth companies and their corporate adviserslinks LCH EquityClear, Cboe Clear Europe and SIX x-clear by the member’s choice; CREST and the European CSDs; the primary markets’ closing prices for the market at closeoverseen by the FCA for the MTF and for the Aquis Stock Exchange as a recognized investment exchange; the AMF for Aquis Exchange Europe in Paristhe day the book with the exchange’s hours; the market at close after 16:35; the trades to the CCPs at the match; CREST on T+2

Aquis charges its members a subscription instead of a fee per trade and bars the fastest firms from taking liquidity, so the brokers’ client orders fill without being picked off. A growth market for the small companies sits beside the book, and a Swiss owner since 2025 is building a pan-European exchange around it.

The subscription model: Aquis’s founder came from Chi-X and ITG with the idea that an exchange should price like a utility: a flat monthly subscription tiered by the message bandwidth rather than a fee per share, which makes the marginal trade free, removes the maker-taker rebates and their distortions, and favors the large brokers that spread the fee over their flow; the model stayed Aquis’s own, and the market share grew slowly toward 5%.
Non-aggressive proprietary trading: Aquis’s rule of 2016 bars the proprietary trading firms from taking liquidity (they may post passive orders only), on the argument that the fastest takers pick off the resting orders of the brokers’ clients and raise the cost of trading for the end investors; the brokers’ routers measure the lower toxicity in the post-trade price reversion and the fill rates, which is how a venue with no rebates wins flow.
The Aquis Stock Exchange: the former NEX Exchange (and before it the PLUS and OFEX markets) is a recognized investment exchange for the smaller companies, bought by Aquis in 2020 and relaunched with the Access and Apex segments of its growth market and a lighter rulebook than AIM’s, with a corporate adviser for each company; it is where the FCA’s and the government’s wish for more growth listings in London meets the thin liquidity of the small caps.
SIX and the pan-European exchange: SIX Group, owned by the Swiss banks, runs the SIX Swiss Exchange, bought the Spanish exchanges (BME) in 2020 and Aquis in 2025 (GBP 207,000,000, 727 pence a share) to combine two primary markets with a pan-European MTF and a technology business; the Swiss shares, which returned to the London MTFs when the UK recognized the Swiss venues in 2021, are the natural link; the Aquis brand and its London and Paris venues continue under SIX.

CLS›CLS in SterlingInstrument card: FX Spot

CLS in Sterling: the Pay-Ins by CHAPS to the Bank of England, Payment Versus Payment and the Pay-Outs, the London Market Behind It

The sterling side of the FX settlement system: the trades submitted and matched with the pay-in schedule netted per member, the pay-ins by CHAPS to CLS’s account at the Bank of England from 06:00 London in the European morning window, the settlement on CLS’s books payment versus payment with the sterling leg against the other currency at its central bank, the pay-outs by CHAPS by 11:00 with the account back to zero, the London FX market that makes the trades with the 4pm fix and the FX Global Code, the sterling settled outside CLS with the risk that remains, and the Bank of England’s supervision of a recognized payment system with its seat on the Fed-led Oversight Committee.

Worked example, illustrative:owner CLS Group Holdings, owned by the settlement member banks; CLS Bank International under the Fed, since 2002; sterling among the seven founding currencieshandles the sterling legs of FX spot, forwards and swaps settled payment versus payment; GBP 350,000,000,000 a day, illustrativemembers the London banks and the London branches of the foreign banks among the 70 or so settlement members; the UK banks, funds and corporates as third parties through themlinks CHAPS and CLS’s account at the Bank of England for the pay-ins and pay-outs; the accounts at the 17 other central banks for the other legs; the sterling liquidity providers; the London FX venues as the source of the tradesoverseen by the Bank of England as a recognized payment system; the Federal Reserve as primary supervisor; the CLS Oversight Committee of the 18 central banksthe day submission on T; the pay-in schedule the evening before; CHAPS opens 06:00; the window 06:00 to 11:00 London; settlement from 06:00; the account at zero by 11:00

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The sterling leg of the world’s FX trades is paid into an account at the Bank of England by CHAPS from six in the morning, settled on CLS’s books against the other currency both legs at once, and paid out by eleven. London makes most of the trades, and the Bank watches the system that settles them from a seat on the committee the Fed chairs.

CLS and London: CLS was built by the banks after the central banks’ 1996 report on FX settlement risk and opened in 2002 with sterling among its first seven currencies; its operations center sits in London beside New York, most of the trades it settles are made in London, and the London banks are its largest settlement members, so the sterling leg is a small share of its value (about 6%, illustrative) but the London market is most of its business.
The window and CHAPS: the five-hour window from 07:00 to 12:00 CET is 06:00 to 11:00 in London, and the Bank of England’s decision to open CHAPS at 06:00 (and the planned 01:30 opening from 2027) serves the CLS pay-ins among other things; the sterling pay-ins are CHAPS payments from the members’ settlement accounts to CLS’s account at the Bank, and the pay-outs the reverse, so the FX settlement day is the first thing CHAPS does each morning.
The settlement risk that remains: the BIS Triennial Survey of 2022 estimated that about a third of the global FX turnover (USD 2,200,000,000,000 a day) settles without payment versus payment, in the currencies CLS does not cover and among the firms that are not members or third parties; the FX Global Code’s principle 35 and the central banks’ 2023 work on the settlement risk push the market toward PvP, and the Bank of England’s and the FCA’s supervision of the London banks is where the pressure reaches the sterling trades.
The oversight: CLS Bank International is an Edge corporation chartered under the Federal Reserve, which supervises it, and the central banks whose currencies it settles oversee it together through the CLS Oversight Committee the Fed chairs under the 2008 protocol; in the UK CLS is a recognized payment system under the Banking Act 2009, which gives the Bank of England the powers of a supervisor for the sterling settlement beside its seat on the committee.