Certain features of the FIX Protocol that were implemented in earlier versions of the FIX Protocol specification, have been replaced by a different approach. Such features have been labeled as "Deprecated" throughout the FIX Specification document. This means that feature is being phased out, systems that implement the FIX Protocol should be adjusted to use the new, supported approach, and the next version of the FIX Specification will remove the feature altogether.
The rationale behind deprecating a feature is based upon either:
The new, supported approach for each deprecated feature is identified below:
The TotalAccruedInterestAmt field introduced in FIX 4.3 has been replaced by the FIX 4.4-introduced AllocAccruedInterestAmt (742) field for the allocation-level value. Note that AccruedInterestAmt (tag 159) represents the block-level (total). Affects Allocation messaging.
AllocSettlCurrAmt (737) and AllocSettlCurrency (736) fields should be used instead of SettlCurrAmt (119) and SettlCurrency (120) within the NoAllocs repeating group. Affects Allocation messaging.
Deprecated RedemptionDate (240) from <Instrument>, UnderlyingRedemptionDate (247) from <UnderlyingInstrument>, and LegRedemptionDate (254) from <InstrumentLeg>. YieldRedemptionDate (696) in <YieldData> component block should be used instead.
The main body of the Settlement Instruction (now a component block) has been added to the allocation and confirmation messages (Allocation Instruction, Allocation Report and Confirmation).
Deprecated the following fields from <Instrument>, <UnderlyingInstrument>, and <LegInstrument> component blocks: RepoCollateralSecurityType (239), RepurchaseTerm (226), RepurchaseRate (227), UnderlyingRepoCollateralSecurityType (243), UnderlyingRepurchaseTerm (244), UnderlyingRepurchaseRate (245), LegRepoCollateralSecurityType (250), LegRepurchaseTerm (251), LegRepurchaseRate (252). The RepoCollateralSecurityType (239) field is satisfied with UnderlyingSecurityType (310), RepurchaseTerm (226) by TerminationType (788), RepurchaseRate (227) by Price (44). The corresponding Underlying... and Leg... equivalents have no meaning. FIX 4.4 introduced significant enhancements to support Product="Financing" (e.g. Repos).
Mapping of the deprecated SecurityType field's values is as follows:
| Deprecated Value within SecurityType (167) field | SecurityType (167) | ||
|---|---|---|---|
| UST | US Treasury Note | TNOTE | US Treasury Note |
| USTB | US Treasury Bill | TBILL | US Treasury Bill |
Deprecated LegQty (tag 687) from the following message types: QuoteRequest, QuoteResponse, QuoteRequestReject, Quote, QuoteStatusReport, New Order — Multileg, and Execution Report.
The LegOrderQty (tag 685) should be used instead to convey the order quantity at the leg level. In an Execution Report the LegOrderQty is used to echo back the order quantity from the order submission.
Deprecated TargetStrategyParameters (848) and ParticipationRate (849) from the following message types: New Order — Single, New Order — Multileg, Order Cancel/Replace Request, Multileg Order Cancel/Replace Request, Execution Report, New Order — Cross, Cross Order Cancel/Replace Request, New Order — List
The NoStrategyParameters repeating group is used instead to convey target strategy parameters and values. See Equities section of Volume 7 for additional usage.
Deprecated SecondaryTradeReportID (818) and SecondaryTradeReportRefID (881) from the Trade Capture Report messages. These fields are no longer used.
Deprecated MaxFloor (111) and MaxShow (210) from messages. They are replaced with DisplayQty and SecondaryDisplayQty, repsectively, in the DisplayInstruction component block.
Deprecated OddLot (575) and replaced its usage with LotType (1093) which allows for identifying whether the lot size is an odd lot, round lot, or block lot.
The following enum values are deprecated from ExecInst (18):
L — Last Peg
M — Mid price Peg
O — Opening peg
P — Market Peg
R — Primary peg
T — Fixed peg to local best bid/offer at time of order
W — Peg to VWAP
a — Trailing Stop Peg
d — Peg to limit
Its usage is replaced by the field PegPriceType (1094) in the PegInstructions component block. The values are:
1 — Last peg
2 — mid-price peg
3 — opening peg
4 — market peg
5 — primary peg (primary market — buy at bid or sell at offer)
6 — Fixed peg to local best bid or offer at time of order
7 — Peg to VWAP
8 — Trailing Stop peg
9 — Peg to limit price
The following fields are being deprecated from use as FX support for FX Swaps will now use the New Order — Multileg and other existing multileg components: OrderQty2 (192), SettlDate2 (193), Price2 (640), LastForwardPoints2 (641), BidForwardPoints2 (642), and OfferForwardPoints2 (643)
The QuoteType (537) is only deprecated from the QuoteResponse message as it was a cut/paste error when the message was created in FIX 4.4 and does not make sense for this message.
The following fields are being deprecated from use: MDENtryOriginator (282) and MDMkt (275). Its usage is replaced by corresponding values in PartyRole (452).
The following fields are being deprecated only from the Market Data messages: LocationID (283) and DeskID (284). Its usage is replaced by corresponding values in PartyRole (452).