Concession (FIX tag 238)

AmtFIX 4.4FIX 5.0 SP2

Concession (tag 238) is an Amt field defined in FIX 4.4 and FIX 5.0 SP2. It appears in 5 message types, always optionally.

At a glance

Tag: 238
Name: Concession
Datatype: Amt (float)
Dialects: FIX 4.4 and FIX 5.0 SP2
Messages: 5

What the specification says

FIX 4.4

Provides the reduction in price for the secondary market in Municipals. (Note tag # was reserved in FIX 4.1, added in FIX 4.3)

FIX 5.0 SP2

Provides the reduction in price for the secondary market in Muncipals.

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

A real message using tag 238

ExecutionReport · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	147
35	MsgType	8	Execution Report
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
37	OrderID	ORD-10042
17	ExecID	EXEC-88117
150	ExecType	0	New
39	OrdStatus	0	New
54	Side	1	Buy
151	LeavesQty	0
14	CumQty	1000000
6	AvgPx	1.09215
238	Concession	125000.00
10	CheckSum	175

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 238 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 5.0 SP2	Where in the message
AllocationInstruction	J	Optional	Optional	directly on the message body
AllocationInstructionAlert	BM	—	Optional	directly on the message body
AllocationReport	AS	Optional	Optional	directly on the message body
Confirmation	AK	Optional	Optional	directly on the message body
ExecutionReport	8	Optional	Optional	directly on the message body
TradeCaptureReport	AE	Optional	Optional	inside the TrdCapRptSideGrp component
TradeCaptureReportAck	AR	—	Optional	inside the TrdCapRptAckSideGrp component

Wire format

A decimal monetary amount, in the currency named by the message's currency field. @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 238 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[238];field?.name;   // "Concession"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a number

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