Research Data Products
PERMNO® & PERMCO®
Permanent Identifiers. Proven Precision.
PERMNO® & PERMCO® are the foundation of the CRSP Research Data Products infrastructure, providing permanent, unchanging identifiers that track securities and companies across their full lifecycle. Unlike tickers or CUSIPs, these identifiers remain consistent through mergers, name changes, and restructurings.
The result is seamless historical alignment, reliable back-testing, and lasting data integrity trusted by institutions and researchers for decades.
Features and Benefits
CRSP Research Data Products run on PERMNO
Ensuring every dataset is accurate, replicable, and aligned with academic and institutional standards
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| Tickers Change. PERMNO Doesn't. Identifiers persist across a security's entire lifecycle - from IPO through restructuring - providing the stable foundation that financial data demands. |
Mergers and Acquisitions. PERMNO follows securities over the course of time and across corporate actions, ensuring seamless datasets that account for structural changes. |
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| Historical Analysis Requires Consistency. PERMNO provides a unified reference key, allowing researchers to compare decades of market activity without gaps. |
Stable Identifiers and Accurate Linkages. Enables analysts to run simulations with confidence and allows for clean and accurate back testing. |
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