SettlCurrBidFxRate (FIX tag 656)

floatFIX 4.4

SettlCurrBidFxRate (tag 656) is a float field defined in FIX 4.4. It appears in 3 message types, always optionally.

At a glance

Tag: 656
Name: SettlCurrBidFxRate
Datatype: float
Dialects: FIX 4.4
Messages: 3

What the specification says

Foreign exchange rate used to compute the bid "SettlCurrAmt" (119) from Currency (15) to SettlCurrency (120)

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

A real message using tag 656

Quote · FIX 4.4

Tag	Field	Wire value	Meaning
8	BeginString	FIX.4.4
9	BodyLength	83
35	MsgType	S	Quote
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
117	QuoteID	EXAMPLE
656	SettlCurrBidFxRate	1.0
10	CheckSum	036

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 656 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
Quote	S	Optional	directly on the message body
QuoteResponse	AJ	Optional	directly on the message body
QuoteStatusReport	AI	Optional	directly on the message body

Wire format

A decimal number. The wire form keeps its trailing zeros, which is why decoders expose the raw string alongside the parsed number. @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 656 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[656];field?.name;   // "SettlCurrBidFxRate"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a number

Other float 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