MarketSegmentID (FIX tag 1300)

StringFIX 5.0 SP2

MarketSegmentID (tag 1300) is a String field defined in FIX 5.0 SP2. It appears in 28 message types, always optionally.

At a glance

Tag: 1300
Name: MarketSegmentID
Datatype: String
Dialects: FIX 5.0 SP2
Messages: 28

What the specification says

Identifies the market segment

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

A real message using tag 1300

TradeCaptureReport · FIX 5.0 SP2

Tag	Field	Wire value	Meaning
8	BeginString	FIXT.1.1
9	BodyLength	110
35	MsgType	AE	TradeCaptureReport
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
1300	MarketSegmentID	EXAMPLE
32	LastQty	1000000
31	LastPx	1.09210
552	NoSides1 entry	1	repeating group
54	Side	1	Buy
10	CheckSum	093

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 1300 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.

Message	MsgType	Requiredness	Where in the message
DerivativeSecurityList	AA	Optional	inside DerivativeSecurityDefinition › MarketSegmentGrp
DerivativeSecurityListRequest	z	Optional	directly on the message body
DerivativeSecurityListUpdateReport	BR	Optional	inside DerivativeSecurityDefinition › MarketSegmentGrp
MarketDefinition	BU	Optional	directly on the message body
MarketDefinitionRequest	BT	Optional	directly on the message body
MarketDefinitionUpdateReport	BV	Optional	directly on the message body
News	B	Optional	directly on the message body
OrderMassActionReport	BZ	Optional	directly on the message body
OrderMassActionRequest	CA	Optional	directly on the message body
OrderMassCancelReport	r	Optional	directly on the message body
OrderMassCancelRequest	q	Optional	directly on the message body
SecurityDefinition	d	Optional	inside the MarketSegmentGrp component
SecurityDefinitionRequest	c	Optional	directly on the message body
SecurityDefinitionUpdateReport	BP	Optional	inside the MarketSegmentGrp component
SecurityList	y	Optional	directly on the message body
SecurityListRequest	x	Optional	directly on the message body
SecurityListUpdateReport	BK	Optional	directly on the message body
SecurityStatus	f	Optional	directly on the message body
SecurityStatusRequest	e	Optional	directly on the message body
SecurityTypeRequest	v	Optional	directly on the message body
SecurityTypes	w	Optional	directly on the message body
TradeCaptureReport	AE	Optional	directly on the message body
TradeCaptureReportAck	AR	Optional	directly on the message body
TradingSessionList	BJ	Optional	inside the TrdSessLstGrp component
TradingSessionListRequest	BI	Optional	directly on the message body
TradingSessionListUpdateReport	BS	Optional	inside the TrdSessLstGrp component
TradingSessionStatus	h	Optional	directly on the message body
TradingSessionStatusRequest	g	Optional	directly on the message body

Wire format

Free-form text. Any byte except the SOH separator is legal, so values are not trimmed or case-folded on the wire. @boarteam/fix keeps the value as a string; format rules are checked by validate(), which reports validate/invalid-value rather than throwing.

Read tag 1300 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[1300];field?.name;   // "MarketSegmentID"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a string

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

Try the decoder Source on GitHub