EndStrikePxRange (FIX tag 1203)

PriceFIX 5.0 SP2

EndStrikePxRange (tag 1203) is a Price field defined in FIX 5.0 SP2. It appears in 6 message types, always optionally.

At a glance

Tag
1203
Name
EndStrikePxRange
Datatype
Price (float)
Dialects
FIX 5.0 SP2
Messages
6

What the specification says

Ending price of the range to which the StrikeIncrement applies. Price refers to the price of the underlying

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 1203

SecurityDefinition · FIX 5.0 SP2
TagFieldWire valueMeaning
8BeginStringFIXT.1.1
9BodyLength139
35MsgTypedSecurityDefinition
49SenderCompIDBOARTEAM
56TargetCompIDCOUNTERPARTY
34MsgSeqNum2
52SendingTime20240101-12:00:00.000
1310NoMarketSegments1 entry1repeating group
1301MarketIDXNAS
1201NoStrikeRules2 entries2repeating group
1223StrikeRuleIDEXAMPLE
1203EndStrikePxRange1.09210
1223StrikeRuleIDEXAMPLE
1203EndStrikePxRange1.09210
10CheckSum235
Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 5.0 SP2 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Where tag 1203 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

MessageMsgTypeRequirednessWhere in the message
DerivativeSecurityListAAOptionalinside DerivativeSecurityDefinition › MarketSegmentGrp › StrikeRules
DerivativeSecurityListUpdateReportBROptionalinside DerivativeSecurityDefinition › MarketSegmentGrp › StrikeRules
SecurityDefinitiondOptionalinside MarketSegmentGrp › StrikeRules
SecurityDefinitionUpdateReportBPOptionalinside MarketSegmentGrp › StrikeRules
SecurityListyOptionalinside SecListGrp › StrikeRules
SecurityListUpdateReportBKOptionalinside SecLstUpdRelSymGrp › StrikeRules

Wire format

A decimal price. Precision is a venue convention, not a protocol rule, so compare the raw string when exactness matters. @boarteam/fix parses the value as a number and reports parse/invalid-float when it does not lex as one; the raw string is kept so precision and trailing zeros are never lost.

Read tag 1203 in TypeScript

decode.tsts
import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix50sp2";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const field = message.fields[1203];field?.name;   // "EndStrikePxRange"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a number

Other Price fields

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix50sp2