ISIN
International Securities Identification Number
A 12-character alphanumeric code that uniquely identifies securities worldwide.
The ISIN is a globally recognized standard for identifying securities, established by ISO 6166. It consists of a two-character country code, followed by a nine-character national security identifier, and ends with a check digit. ISINs are used to facilitate cross-border trading and settlement by providing a consistent identification system across different markets and jurisdictions. They are assigned by national numbering agencies and are essential for regulatory reporting, trade settlement, and portfolio management. The system covers equities, bonds, derivatives, and other financial instruments, making it a cornerstone of modern financial infrastructure.
Example
US0378331005 (Apple Inc.) — US (country) + 037833100 (identifier) + 5 (check digit)