For Developers

88.0.0+92119.59fc1ff - 18/06/2026

Production Release - 27/06/2026

Service Changes

• LTX - Trading - Price ASAP/BIN [in progress]
• LTX - Trading - Spread ASAP/BIN [in progress]
• ICE Bondpoint - Taker Trading - CAT [in progress]
• ICE Bondpoint - Taker Trading - RFQ [complete]
• Tradeweb EUGV - Trading - Basis [complete]
• Tradeweb EUGV - Post Trade - Basis [complete]
• Tradeweb EURP - Post Trade - Map collateralUTI on CollateralAssignmentEvent [complete]
• Markovtech - Market Data [complete]
• Markovtech - Taker Trading [complete]
• ICAP & TP US Repo - Market Data - Update method to subscribe to data [complete]
• Bloomberg CDS TOMS Trade Capture - Support for AmendTradeAction [in progress]
• iSwap IRS - RFQ - ICAP iSwap - Inquiry - RFQ/RFM/Process Trade/Compression [in progress]
• GLMX - Trading - Send InquiryNegotiatedOffTransficcApiEvent instead of erroring [complete]
• eTrading Platform - Reference Data Service - Clean up expired instrument ref data [complete]
• eTrading Platform - Trader Desktop - Support Tradeweb Direct [in progress]
• eTrading Platform - Trader Desktop - Multi Price Type [complete]
• eTrading Platform - Trader Desktop - Make tick increments customizable [complete]
• eTrading Platform - Trader Desktop - Trader Desktop IRS: NPV to Rate Conversion [in progress]
• Outsourced Liquidity Solutions Business - Trading - Support pricing between ticks [in progress]
• Outsourced Liquidity Solutions Business - Trading - Set filter for instruments sent to liquidity provider in UI [in progress]
• Outsourced Liquidity Solutions Business - Price Contribution - Handle message rate breaches [in progress]

Library Changes

• Add venue enums TRADEWEB_EU_ETF_PLUS_CONTRIBUTION, TRADEWEB_EU_ETF_POST_TRADE, TRADEWEB_EU_ETF_TRADING, MARKOVTECH_MARKET_DATA, MARKOVTECH_TRADING_TAKER

Bloomberg Toms Tradecapture Protocol

• Add clearingFirm, symbolCds and execAccount to AmendTradeAction

Post Trade Protocol

• Add salesPersonName to TradeEvent.venueSpecificInfo for Bloomberg CDS
• Add brokerageFeeMarkup to TradeEvent.venueSpecificInfo for Bloomberg Bonds
• Add floatingRateLookbackPeriodDays, floatingRateLockoutPeriodDays, structureOptionDate to TradeEvent.repoSpecificInfo

Inquiry Protocol

• Add benchmarkQuantity to PriceConfirmationAction
• Add floatingRateLookbackPeriodDays, floatingRateLockoutPeriodDays, structureOptionDate, benchmarkPoint to QuoteRequestEvent.EventLeg.QuoteRequestRepoSpecificInfo
• Remove floatingRateCalculationMethod from QuoteRequestEvent.eventLeg.venueSpecificInfo for Tradeweb EURP in favour of newly added fields
• Add underlyingDirtyPrice to CounterEvent.CounterLeg.venueSpecificInfo and HitLiftSubjectEvent.HitLiftLeg.venueSpecificInfo for Tradeweb EURP
• Add yield to QuoteRequestEvent.eventLeg.venueSpecificInfo for Tradeweb EUGV basis
• Update state machine diagram to mention basis for Tradeweb EUGV

Taker Inquiry Protocol

• Fix docs for usage of quoteRevealType
• Rename NewQuoteRequestAction.newQuoteRequestVenueSpecificData fields janestreetPlatform, janestreetClientCode, janestreetClientLocation, janestreetClientTier respectively to platform, clientCode, clientLocation, clientTier
• Add docs for Markovtech
• Add state machine diagrams for ICE Bondpoint Taker RFQ and CAT

86.0.0+90521.a612956 - 22/05/2026

Production Release - 30/05/2026

Service Changes

• TP EU Bonds Post Trade - wrong settlement date being mapped [complete]
• Outsourced Liquidity Solutions Business - Price Contribution LDM [complete]
• Outsourced Liquidity Solutions Business - Trading - Support Bonds inquiries [complete]
• Outsourced Liquidity Solutions Business - Trading - Support pricing between ticks [in progress]
• Outsourced Liquidity Solutions Business - Trading - Show liquidity provider as owner on trader desktop UI [in progress]
• Brokertec CME US - Orders [complete]
• LTX - IOI [complete]
• LTX - Post Trade [complete]
• LTX - Trading - Price ASAP/BIN [in progress]
• Use instrumentReference when trading on CLOB Protocol [complete]
• Bloomberg Bonds - Trading - Add number of dealers in the final report where addition of dealers mid RFQ is possible [complete]
• eTrading Platform - Trader Desktop - Dealer Reject via the blotter - [in progress]
• eTrading Platform - Trader Desktop - Keyboard Shortcuts [complete]
• eTrading Platform - Trader Desktop - Reveal side when known for BBG RFMs [complete]
• eTrading Platform - Trader Desktop - change minimum dismissal time to 0 seconds [complete]
• eTrading Platform - Trader Desktop - Ensure completed inquiries in eTrading get removed intraday [complete]
• eTrading Platform - Trader Desktop - Trader Desktop IRS: NPV to Rate Conversion [in progress]
• eTrading Platform - Trader Desktop - Multi Price Type [in progress]
• Tradeweb US & EU CDS (Price Contribution) Rolls/Curves/Switches - Bid Sided Contribution (Cross Market Issue) [complete]
• ICE Tmc Taker - RFQ - ICE TMC - Taker Trading [complete]
• ICE Tmc Taker - CAT - ICE TMC - Taker Trading [in progress]
• iSwap IRS - RFQ - ICAP iSwap - Inquiry - RFQ/RFM/Process Trade/Compression [in progress]
• GLMX - Inquiry - QuoteAction - Add underlyingAllInSettlePrice [complete]
• GLMX - Inquiry - QuoteAction / DealerAcceptAction - Add commission [complete]
• eTrading Platform - Trader Desktop - Allow aliasing of Compression RFM trade side [complete]

Library Changes

• Add venues - LTX_POST_TRADE, LTX_TRADING, LTX_IOI_CONTRIBUTION

Inquiry Protocol

• Add commission to QuoteAction.venueSpecificData and DealerAcceptAction.venueSpecificData for GLMX_TRADING
• Add underlyingAllInSettlePrice into QuoteAction.quoteRepoSpecificInfo for GLMX_TRADING and TRADEWEB_EURP_TRADING
• Add numberOfDealers NegotiationReportEvent.venueSpecificInfo and TradedNegotiationReportEvent.venueSpecificInfo for Bloomberg Bonds

Taker Inquiry Protocol

• Add iceTmcTradeDate to NewQuoteRequestAction.venueSpecificData

Clob Trading Protocol

• Change how instruments are specified on actions using instrumentReference

eTrading Changes

Inquiry Protocol

• Add documentation to price.json regarding optional additional prices

84.0.0+88910.5d63bad - 22/04/2026

Production Release - 02/05/2026

Service Changes

• Brokertec CME US - Post Trade [complete]
• Brokertec CME US - Orders [in progress]
• Tradeweb MBSP - Trading - NC List PayUp [complete]
• Tradeweb MBSP - Trading - NC List Swap vs TBA [complete]
• Tradeweb MBSP - Post Trade [complete]
• Outsourced Liquidity Solutions Business - Price Contribution - LDM [in progress]
• Trumid List - Inquiry - Money Market Yield [complete]
• Trumid List - Inquiry - Support for TieBreakEvent [complete]
• Bloomberg CDS - Click And Trade [complete]
• Tradeweb US CDS - Click And Trade - Outright Indices [in progress]
• Tradeweb US CDS - Trading - Indices Rolls/Switches/Curves [in progress]
• eTrading Platform - Trader Desktop - Multi Price Type [in progress]
• eTrading Platform - Keyboard Shortcuts [complete]
• Bloomberg Bonds - Trading - EFP RFM [complete]
• Bloomberg Bonds - CAT - Fix issue with FX settlement rate not being used
• Use instrumentReference when trading on CLOB Protocol - [in progress] Please talk to us if upgrading to this version for CLOB protocol
• Octaura Loans - Post Trade - Support process trades
• Tradeweb EU Corp - Post Trade - Add support for spread trading
• Tradeweb EURP - Post Trade - Update calculation of TradeAllocationEvent.allocationNetAmount for Triparty

Library Changes

Inquiry Protocol

• Rename venueSpecificInfo key TradeAxeIndicator to tradeAxeIndicator
• Rename Tradeweb MBSP venueSpecificInfo key GroupID to groupId

Static Data Protocol

• Update schema documentation regarding instrumentReference field description and its relationship with the CLOB protocol

Post Trade Protocol

• Add Brokertec CME US TradeEvent.venueSpecificInfo tradeConnectionName
• Rename venueSpecificInfo key RFQWonTied to rfqWonTied

Clob Trading Protocol

• Add instrumentReference to NewOrderAction, NewQuoteAction, OrderFillEvent, QuoteFillEvent and ClobStatusEvent

82.0.0+87889.99ef574 - 26/03/2026

Production Release - 04/04/2026

Service Changes

• Tradeweb MBSP - Trading - NC List PayUp [in progress]
• Tradeweb MBSP - Trading - NC List Swap vs TBA [in progress]
• Tradeweb MBSP - Post Trade [in progress]
• Tradeweb EU IRS/DSWP/YSWP - Price Contribution - Support async contributions [complete]
• Tradeweb EU CDS - Trading - Support Indices and Roll Switches [in progress]
• Tradeweb EU CDS - Post Trade - Support Indices and Roll Switches [in progress]
• Tradeweb EU CDS - Click And Trade - Support Outright Indices [in progress]
• Tradeweb EU CDS - Click And Trade Post Trade - Support Outright Indices [in progress]
• Bloomberg Bonds - Trading - Bond Basis [complete]
• Bloomberg Bonds - Trading - Efp [complete]
• Bloomberg Bonds - Trading - Set counterparty qualifier for bridge inquiries [complete]
• Outsourced Liquidity Solutions Business - Post Trade - FPML obfuscation and pricing [complete]
• Outsourced Liquidity Solutions Business - Compressions - Synthetic leg pricing for RFM [complete]
• eTrading Platform - Credit - quantity negotiation [complete]
• eTrading Platform - Rates - UST, EGB/UKT & EUCORP Support [complete]
• eTrading Platform - Allow users to configure inquiry dismissal time on UI [complete]
• Tradeweb EURP - Trading - AON - Support leg level book IDs for QuoteAction [complete]

Library Changes

• Add venue enum TRADEWEB_MBSP_POST_TRADE

Price Contribution Protocol

• add liquidityTier to QuoteAction and CancelQuoteAction (required on Tradeweb EU CDS/ Tradeweb US CDS for Indices)

eTrading Changes

On Demand Pricer Protocol

• Add delta and pv01 to priceInstrument on Price

80.0.0+86703.a3f4d20 - 27/02/2026

Production Release - 07/03/2026

Service Changes

• Bloomberg CDS - Click And Trade - Single Name & Outright Indices [complete]
• Bloomberg CDS - Click And Trade - Rolls and Switch Indices [in progress]
• Neptune - IOI [complete]
• Bloomberg IRS - Update For New BSEF Block Trade Message Flow [complete]
• Jane Street - Taker Trading [complete]
• Outsourced Liquidity Solutions Business - Compressions - Compression support [complete]
• eTrading Platform - Credit - TransACT support for Trumid List [complete]
• eTrading Platform - Credit - yield trading support [complete]
• eTrading Platform - Credit - quantity negotiation [in progress]
• eTrading Platform - Credit - split benchmark and axe/positions details on ticket [complete]
• MarketAxess Muni Taker - Inquiry - Spread NC List [complete]
• MTS Repo Post Trade - [in progress]
• MarketAxess IOI & MarketAxess Muni IOI - Throughput Limit Increase [complete]

Library Changes

• Add venue enum MTS_REPO_POST_TRADE
• Update state machine diagram for MarketAxess Muni Taker

Inquiry Protocol

• Update documentation and validation for raising lists for MarketAxess Muni Taker (A2A support only, BIN quote reveal, and mandatory staged flag)
• Populate event legs on all sent CustomerAcceptEvent, previously legs were missing in MTS BondVision, GLMX, Bloomberg Bonds MOC

Post Trade Protocol

• Rename brokerageFee to brokerageFeeMarkup for Tradeweb IRS/DSWP/YSWP on TradeEvent.venueSpecificInfo

eTrading Changes

Reference Data Protocol

• Add following fields to bond-instrument-data.json: calculationType, interestAccrualDate, firstSettleDate, firstCouponPaymentDate, coupon, couponFrequency, dayCount, called, maturityDate, nextCallDate, issueDate, isUsOnTheRun, whenIssued, standardSettlementPeriod, calendarCode

Historic Data Service Protocol

• Add initialQuantity to leg.json to support dealer quantity countering
• Add more values to quantity-negotiable.json
• Add fields to inquiry-snapshot.json to: ticker, sector, group, issuer, amtOutstanding, moody, standardAndPoors, rdiCustom1

78.0.0+85732.1673256 - 27/01/2026

Production Release - 07/02/2026

Service Changes

• Outsourced Liquidity Solutions Business - Post Trade [in progress]
• MarketAxess Muni Taker - Inquiry - MNPrice NC List [complete]
• MarketAxess Muni Taker - Inquiry - Yield NC List [in progress]
• MarketAxess US - RFQ - Support InquiryNegotiatedAwayFromTransficcApi [complete]
• E-Trading Platform Core Etrading - Support CAT Trades [in progress]
• E-Trading Platform Core Etrading - Support Bond Yield Trades [in progress]
• Jane Street - Taker Trading [in progress]

Library Changes

Inquiry Protocol

• Remove CounterpartyFirm.isUsPerson from QuoteRequestEvent. This has different meaning across venues, and is now present in venue specific information instead.
• Add isUSEntity to QuoteRequestEvent.eventLeg.venueSpecificInfo for Tradeweb IRS/DSWP/YSWP/EUCDS/USCDS
• Add isUSPerson to QuoteRequestEvent.eventLeg.venueSpecificInfo for Bloomberg IRS/CDS

Taker Inquiry Protocol

• Add NegotiationInformationAction, NegotiationInformationResponseEvent and NegotiationInformationActionFailureEvent
• Add PriceConfirmationAgreedEvent
• Add quoteCompetitiveStatus to CancelQuoteRequest.venueSpecificData
• Add PENDING_PRICE_CONFIRMATION to State

Post Trade Protocol

• Add rollConvention and restructuringType to TradeEvent.venueSpecificInfo

Clearing Protocol

• Add tradeExecutionTimestampNanos to AllegeTradeAction

eTrading Changes

On Demand Pricer Protocol

• Add YIELD to price-type enum
• Add customerPackagePrice to request-for-stream message

Historic Data Service Protocol

• Add YIELD to price-type enum

76.0.0+85028.7203673 – 05/01/2026
Production Release – 10/01/2026
 

Service Changes

* Tradeweb AUGV – Market Data [in progress]
* MarketAxess Muni – Inquiry – RFQ [complete]
* MarketAxess Muni Taker – Inquiry – Price NC List [in progress]
* MarketAxess Muni Taker – Inquiry – MNPrice BIN [in progress]
* MarketAxess Muni Taker – Post Trade [complete]
* Bloomberg US CDS – Post Trade [complete]
* Tullett EU Bonds – Post Trade – Credit [complete]
* E-Trading Platform Core Etrading – Remove IRS Dock [in progress]
* E-Trading Platform Core Etrading – Support Process Trades [complete]
* Outsourced Liquidity Solutions Business – GBP markup [complete]
* Outsourced Liquidity Solutions Business – Post Trade [in progress]
* Tradeweb EURP/IRS/DSWP/YSWP/UST/CDS – Remove changes around HitLiftSubjectEvent crosses with an action [complete]

Library Changes

* Add venue enum TRADEWEB_AUGV_MARKET_DATA

IOI Contribution Protocol

* Add IOIAction.venueSpecificData.marketaxessMinQuantity for MarketAxess Muni IOI Contributions

Inquiry Protocol

* Add QuoteRequestEvent.venueSpecificInfo.rfqMinDealerExceptionReason for Bloomberg CDS
* Add QuoteRequestEvent.venueSpecificInfo.maturityDate for Tradeweb IRS, DSWP, and YSWP

Taker Inquiry Protocol

* Add CancelListAction and CancelListActionFailureEvent
* Add NewQuoteRequestResponseEvent.newQuoteRequestVenueSpecificData.marketAxessTradingProtocol and DealerQuoteEvent.QuoteLeg.venueSpecificInfo.spotNegotiationModel for MarketAxess Muni Trading Taker

Post Trade Protocol

* Add contractualMatrixTerm, seniority, affirmationPlatform, interestAccrualDate, initialPaymentPayer, initialPaymentReceiver, restructuringType, and uniqueTradeIdNameSpace to TradeEvent.venueSpecificInfo for GBX CDS Post Trade

eTrading Changes

On Demand Pricer Protocol

* add venue field to request-for-stream.json
* add isProcessTrade field to request-for-stream.json

Historic Data Service Protocol

* add voiceTradeTimestampNanos field to inquiry-snapshot.json