SettlCurrency (FIX tag 120)

CurrencyFIX 4.4FIX 4.2

SettlCurrency (tag 120) is a Currency field defined in FIX 4.4 and FIX 4.2. It appears in 12 message types, always optionally.

At a glance

Tag: 120
Name: SettlCurrency
Datatype: Currency (String)
Dialects: FIX 4.4 and FIX 4.2
Messages: 12

What the specification says

Currency code of settlement denomination.

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

A real message using tag 120

NewOrderSingle · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	119
35	MsgType	D	Order – Single
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
11	ClOrdID	ORD-10042
54	Side	1	Buy
60	TransactTime	20240101-12:00:00.000
40	OrdType	1	Market
120	SettlCurrency	EUR
10	CheckSum	181

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.

Where tag 120 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	FIX 4.4	FIX 4.2	Where in the message
AllocationInstruction	J	Conditional	Optional	inside the AllocGrp component
AllocationReport	AS	Conditional	—	inside the AllocGrp component
Confirmation	AK	Optional	—	directly on the message body
CrossOrderCancelReplaceRequest	t	Conditional	—	inside the SideCrossOrdModGrp component
ExecutionReport	8	Optional	Optional	directly on the message body
MultilegOrderCancelReplace	AC	Conditional	—	directly on the message body
NewOrderCross	s	Conditional	—	inside the SideCrossOrdModGrp component
NewOrderList	E	Optional	Optional	inside the ListOrdGrp component
NewOrderMultileg	AB	Conditional	—	directly on the message body
NewOrderSingle	D	Conditional	Optional	directly on the message body
OrderCancelReplaceRequest	G	Conditional	Optional	directly on the message body
TradeCaptureReport	AE	Conditional	—	inside the TrdCapRptSideGrp component

Wire format

A three-letter ISO 4217 code. @boarteam/fix keeps the value as a string; format rules are checked by validate(), which reports validate/invalid-value rather than throwing.

Read tag 120 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 field = message.fields[120];field?.name;   // "SettlCurrency"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a string

Other Currency 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-fix44

Try the decoder Source on GitHub