ISIN
Pronunciation: EYE-sin
Also written as: ISIN — International Securities Identification Number
Acronym for International Securities Identification Number; a twelve-character alphanumeric code that uniquely identifies a security globally.
Full Definition
The International Securities Identification Number (ISIN) is a globally recognised twelve-character identifier for securities, standardised under ISO 6166. It consists of a two-letter country code, a nine-character national security identifier (such as a CUSIP in the US), and a single check digit. ISINs are used in international settlement, cross-border transactions, and regulatory filings. Editors working on documents with both US and international distribution must be aware that a US CUSIP-based ISIN is formed by prepending 'US' and appending a check digit to the CUSIP. 'ISIN' is always rendered in all capitals.
Usage
Usage note: Spell out at first mention. A CUSIP and an ISIN are not the same number; ISIN is twelve characters, CUSIP is nine.
In Context
- "The offering circular listed both the ISIN and the CUSIP for the convenience of international investors." — Offering Circular
- "Verify that the ISIN on page 12 corresponds to the correct series of notes before publication." — Editorial Checklist