Overview
ISO/TR 21797:2019 provides a structured overview of existing and currently used financial instrument identifiers. The technical report maps which identifiers, ticker symbols and proprietary codes are assigned via standardized schemes across the full spectrum of asset classes. The document focuses on describing the identification landscape rather than evaluating or ranking identifier schemes.
This overview is intended to help data managers, market infrastructure providers, implementers of messaging standards and regulators understand the variety of identification systems, when multiple identifiers are used in a trading lifecycle, and where interoperability effort may be best targeted. A machine-readable identifier inventory is available from the ISO link referenced in the report.
Key principles and scope
- The report surveys international, national, regional and proprietary identifier schemes.
- It documents the common uses and coverage of identifiers, but does not provide technical evaluations of each scheme.
- Complex trade-cycle functions (e.g., book building, order entry management, execution matching) are excluded to preserve readability.
- Changing perspectives on what constitutes a financial instrument in different functional contexts are likewise outside the scope.
Key Topics
- Identifier types: international, national, regional and proprietary identifiers are defined and distinguished. Examples cited in the report include ISIN and Common Code as international identifiers, and asset-specific identifiers such as APIR for collective investment vehicles and OCC codes for certain US/Canada derivatives listings.
- Asset-class coverage: the report classifies identifiers relative to asset classes, using ISO 10962 classification as a primary reference for instrument categorization.
- Usage in messaging standards: the overview notes identifier usage across major messaging frameworks (for example ISO 15022, ISO 20022, FpML and FIX) and highlights that different identifiers may apply to different stages of the trade lifecycle.
- Licensing and openness: schemes may be open data, subject to licensing, or cost-recovery; the report flags these practical considerations.
Applications
- Facilitates data mapping and consolidation across systems that use multiple identifier schemes.
- Supports harmonization and interoperability initiatives by clarifying where overlaps and gaps exist.
- Assists implementers of market messaging standards and reference data management teams in selecting identifiers appropriate to function and jurisdiction.
- Provides a common reference for regulators and market participants seeking transparency in instrument identification.
Related Standards
The report references several ISO standards that are relevant to instrument identification and messaging, including:
For a complete inventory and the machine-readable file of identifier relationships, consult the ISO/TR 21797:2019 document and the annexed identifier overview.
