CUSIP
A CUSIP is a nine-character identifier for a specific security issue, used to match U.S. and Canadian instruments across trading, custody, and settlement.
CUSIP, ISIN, and SEDOL identify securities in different data systems; matching an instrument requires class, market, currency, and effective-date checks.
Securities identifiers help answer a precise question: which instrument does a trade, price, or holding record describe? A company name is often insufficient because one issuer can have several share classes, bonds, warrants, or depositary receipts.
CUSIP distinguishes specific issues in a system used particularly in U.S. and Canadian markets. ISIN provides international instrument identification, while SEDOL supports global reference data with country-level distinctions. Their different scopes mean that matching one code does not replace every other field.
Use the identifier alongside the exact class or series, market, currency, and effective date. A valid check digit is not proof of official assignment, and an assigned code is not a guarantee of liquidity or investment quality.
Listing status addresses admission to trading; clearing and settlement infrastructure addresses post-trade processing. These educational articles explain the distinctions without recommending particular securities.
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A CUSIP is a nine-character identifier for a specific security issue, used to match U.S. and Canadian instruments across trading, custody, and settlement.
An ISIN is a 12-character global code identifying a financial instrument, distinct from a ticker, trading venue, quotation currency, or investor account.
A Q suffix in U.S. OTC stock symbols signals bankruptcy proceedings, not a recovery guarantee; old shares can be canceled while the business survives.
A SEDOL is a seven-character identifier used in global reference data to match instruments and country-level records for pricing, custody, and trading.