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CRSP Research Data Products are relied on by major financial firms, government entities and leading research universities.

Currently, CRSP data is used by more than 600 subscribers across 35 countries.

PERMNO® is the proprietary reference key for all securities data maintained by CRSP. PERMNOs are permanent identifiers for all US-listed equities that are consistent through time over the life of each security, accounting for all types of corporate actions.

Important Notice: CRSP US Stock & Indexes Databases Flat File Format 2.0 (CIZ)

As previously communicated, CRSP introduced the Stock & Indexes Flat File Format 2.0 (CIZ) in summer 2022. The December 2024 data which was released in January 2025 was the last release of datasets produced in the Legacy (FIZ) and Flat File Format 1.0 (SIZ) formats.

Additional reference materials and resources can be found in the Documents & Resources section of the CRSP US Stock Databases landing page.

CRSP Research Data Products

CRSP US Stock Databases

CRSP Historical Indexes

CRSP/Compustat Merged Database

CRSP Survivor-Bias-Free US Mutual Fund Database

CRSP US Treasury Database

CRSP/Ziman Real Estate Database

CRSP10

CRSP Cap-Based Portfolio Indexes

CRSPMI Intraday Database

CRSPMI Historical Database

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Release Notes

CRSPRDP News & Updates

CRSP US Mid-Cap Index Outperforms Peers

Why do some mid- and small-cap ETFs outperform others? A recent article from ETF.com highlights how benchmark index construction and methodology—especially market cap definitions—can significantly impact ETF performance. [...]

CRSP Market Indexes- PFICs to be Removed from Index Eligibility

Passive Foreign Investment Companies (PFICs), as defined by the IRS, will no longer be eligible for inclusion in the CRSP US Market Indexes. [...]

CRSP Market Indexes US Market Update – Q2 2025

Notable items with this release include: - Markets broadly rallied throughout Q2, with every Cap and Style Index posting gains over the previous 3 months. - Growth largely outperformed Value [...]

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