1. FIX Standards/
  2. FIX 4.3
Log in
  • Overview
  • Messages
  • Fields
  • Components
  • Tools
  • AffectedOrders
  • Allocs
  • Allocs_11
  • Allocs_27
  • Allocs_30
  • Allocs_32
  • Allocs_36
  • Allocs_60
  • Allocs_63
  • BidComponents
  • BidComponents_54
  • BidDescriptors
  • ClearingInstructions
  • CommissionData
  • ContAmts
  • ContAmts_17
  • ContraBrokers
  • Dates
  • DistribInsts
  • Execs
  • Hops
  • Instrument
  • InstrumentLeg
  • IOIQualifiers
  • Legs
  • Legs_10
  • Legs_13
  • Legs_48
  • Legs_49
  • Legs_68
  • Legs_7
  • LegSecurityAltID
  • LinesOfText
  • LinesOfText_26
  • MDEntries
  • MDEntries_44
  • MDEntryTypes
  • MiscFees
  • MiscFees_37
  • MsgTypes
  • NestedParties
  • NestedPartyIDs
  • OrderQtyData
  • Orders
  • Orders_34
  • Orders_38
  • Parties
  • PartyIDs
  • QuoteEntries
  • QuoteEntries_47
  • QuoteEntries_51
  • QuoteSets
  • QuoteSets_50
  • RegistDtls
  • RelatedSym
  • RelatedSym_19
  • RelatedSym_20
  • RelatedSym_22
  • RelatedSym_25
  • RelatedSym_39
  • RelatedSym_41
  • RelatedSym_67
  • RoutingIDs
  • RoutingIDs_21
  • RoutingIDs_24
  • SecurityAltID
  • SecurityTypes
  • Sides
  • Sides_59
  • Sides_62
  • Sides_65

UnderlyingInstrument

TagNameTypeRequiredDescription
311
UnderlyingSymbol
String
Required
312
UnderlyingSymbolSfx
String
309
UnderlyingSecurityID
String
305
UnderlyingSecurityIDSource
String
UnderlyingSecurityAltID
Component
462
UnderlyingProduct
Int
463
UnderlyingCFICode
String
310
UnderlyingSecurityType
String
313
UnderlyingMaturityMonthYear
MonthYear
542
UnderlyingMaturityDate
LocalMktDate
241
UnderlyingCouponPaymentDate
UTCDateOnly
242
UnderlyingIssueDate
UTCDateOnly
243
UnderlyingRepoCollateralSecurityType
String
244
UnderlyingRepurchaseTerm
Int
245
UnderlyingRepurchaseRate
Percentage
246
UnderlyingFactor
Float
256
UnderlyingCreditRating
String
595
UnderlyingInstrRegistry
String
592
UnderlyingCountryOfIssue
Country
593
UnderlyingStateOrProvinceOfIssue
String
594
UnderlyingLocaleOfIssue
String
247
UnderlyingRedemptionDate
UTCDateOnly
315
UnderlyingPutOrCall
Int
316
UnderlyingStrikePrice
Price
317
UnderlyingOptAttribute
Char
436
UnderlyingContractMultiplier
Float
435
UnderlyingCouponRate
Percentage
308
UnderlyingSecurityExchange
Exchange
306
UnderlyingIssuer
String
362
EncodedUnderlyingIssuerLen
Length
363
EncodedUnderlyingIssuer
Data
307
UnderlyingSecurityDesc
String
364
EncodedUnderlyingSecurityDescLen
Length
365
EncodedUnderlyingSecurityDesc
Data

Used By

  • AA
    Derivative Security List
  • AF
    Order Mass Status Request
  • b
    Mass Quote Acknowledgement (via QuoteSets)
  • i
    Mass Quote (via QuoteSets_50)
  • q
    Order Mass Cancel Request
TradingSessions_64UnderlyingSecurityAltID
Fixdev
© 2026 Fixdev ltd
  • Home
  • Contact
  • Terms
  • Privacy