DerivativeUnitOfMeasureQty (FIX tag 1270)

QtyFIX 5.0 SP2

DerivativeUnitOfMeasureQty (tag 1270) is a Qty field defined in FIX 5.0 SP2. It appears in 3 message types, always optionally.

At a glance

Tag: 1270
Name: DerivativeUnitOfMeasureQty
Datatype: Qty (float)
Dialects: FIX 5.0 SP2
Messages: 3

What the specification says

Used to indicate the quantity of the underlying commodity unit of measure on which the contract is based.

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

A real message using tag 1270

DerivativeSecurityListRequest · FIX 5.0 SP2

Tag	Field	Wire value	Meaning
8	BeginString	FIXT.1.1
9	BodyLength	94
35	MsgType	z	DerivativeSecurityListRequest
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
320	SecurityReqID	EXAMPLE
559	SecurityListRequestType	0	Symbol
1270	DerivativeUnitOfMeasureQty	1000000
10	CheckSum	147

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 1270 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 › DerivativeInstrument
DerivativeSecurityListRequest	z	Optional	inside the DerivativeInstrument component
DerivativeSecurityListUpdateReport	BR	Optional	inside DerivativeSecurityDefinition › DerivativeInstrument

Wire format

A decimal quantity. Fractional quantities are legal, which is why this is a float family rather than an integer. @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 1270 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[1270];field?.name;   // "DerivativeUnitOfMeasureQty"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-fix50sp2

Try the decoder Source on GitHub