ISO 20022 external code set

ExternalSecuritiesPurpose1Code: Securities Purpose Codes

Written and maintained by ZagTrader. Last reviewed 21 October 2026. How this page is sourced and checked

Specifies the underlying reason code for an SSI instruction, in the format of character string with a maximum length of 4 characters.

Definition from the ISO 20022 External Code Sets, 2Q2026 (published 28 Aug 2026).

3 codes in use. External code sets are published outside the message schemas and updated every quarter, so a new code can appear without a new message version.

Codes

COLLCollateral ManagementRelates to collateral management.
SECLSecurities LendingRelates to securities lending.
STMTSettlementsRelates to settlements.

Messages that use ExternalSecuritiesPurpose1Code

Message	Element path
reda.056	versions 001.01
reda.057	versions 001.01
reda.058	versions 001.01
reda.059	versions 001.01

All ISO 20022 code sets · ISO 20022 messages

The ISO 20022 code set names, code values, names and definitions on this page are reproduced from material published at iso20022.org under the ISO 20022 Intellectual Property Rights policy. This is not the official source: the up-to-date ISO 20022 standards and repository material are published only at iso20022.org. Explanations in our own words are by ZagTrader. ZagTrader is not affiliated with or endorsed by ISO or Swift.