ISIN
International Securities Identification Number
Definition
A 12-character alphanumeric code that uniquely identifies a specific securities issue internationally. ISINs are used in transaction reporting, settlement, and custody operations to ensure consistent identification of financial instruments across markets and jurisdictions.
Regulatory Context
ISINs are assigned by National Numbering Agencies (NNAs) and are required for regulatory reporting under MiFIR and EMIR. The use of ISINs has been extended beyond traditional securities to cover OTC derivatives through the introduction of derivative ISINs.