CollAction (FIX tag 944)

intFIX 4.4

CollAction (tag 944) is an int field defined in FIX 4.4. It appears in 3 message types, always optionally. It is an enumerated field with 3 defined values.

At a glance

Tag: 944
Name: CollAction
Datatype: int
Dialects: FIX 4.4
Messages: 3
Valid values: 3

What the specification says

Action proposed for an Underlying Instrument instance

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

A real message using tag 944

CollateralResponse · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	167
35	MsgType	AZ	Collateral Response
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
904	CollRespID	EXAMPLE
902	CollAsgnID	EXAMPLE
895	CollAsgnReason	0	Initial
905	CollAsgnRespType	0	Received
60	TransactTime	20240101-12:00:00.000
711	NoUnderlyings2 entries	2	repeating group
311	UnderlyingSymbol	EXAMPLE
944	CollAction	0	Retain
311	UnderlyingSymbol	EXAMPLE
944	CollAction	0	Retain
10	CheckSum	207

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 4.4 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Valid values

A value outside this list is not a parse error — the message still decodes — but validate() reports it as validate/value-not-in-enum.

Value	Meaning	Symbolic name
0	Retain	RETAIN
1	Add	ADD
2	Remove	REMOVE

Where tag 944 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
CollateralAssignment	AY	Conditional	inside the UndInstrmtCollGrp component
CollateralRequest	AX	Conditional	inside the UndInstrmtCollGrp component
CollateralResponse	AZ	Conditional	inside the UndInstrmtCollGrp component

Wire format

A whole number, optionally signed. Leading zeros are legal on the wire and are preserved in the raw value. @boarteam/fix parses the value as a number and reports parse/invalid-int when it does not lex as one; the raw string is kept either way.

Read tag 944 in TypeScript

decode.tsts

import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix44";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const collAction = message.fields[944]?.raw;// e.g. "0" — Retain// The dictionary also carries the labels:const label = fix.dictionary  .fieldByTag(944)  ?.enumValues?.find((e) => e.value === collAction)  ?.description;

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-fix44

Try the decoder Source on GitHub