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The database that started it all, the CRSP US Stock Database is a unique research source characterized by unmatched breadth and depth.
As communicated previously, CRSP has migrated to a new back office and introduced the Stock & Indexes Flat File Format 2.0 (CIZ) in the summer of 2022. Subscribers are required to migrate to CIZ, as 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 below.The CRSP US Stock Databases contain daily and monthly market and corporate action data for over 32,000 active and inactive securities with primary listings on the NYSE, NYSE American, NASDAQ, NYSE Arca and Cboe BZX exchanges and include CRSP broad market indexes.
CRSP US Stock Databases data is delivered via the Cloud utilizing MOVEit Managed File Transfer cloud software.
CRSP’s permanent identifiers allow for clean and accurate backtesting, research utilizing time-series and corporate event data, performance measurement, benchmarking, and securities analysis.
Flat File Format 2.0 (CIZ) User Guide
A table by table listing of data items with short definitions
Streamlines ingestion into proprietary systems and online tools
A detailed guide of calculations and methodologies for Flat File Format 2.0 (CIZ)
Access information for this product
Monthly, quarterly, & annual release notes
An overview of known differences and new features between the new Flat File Format 2.0 (CIZ) and File Format 1.0 (SIZ)
A guide for transitioning from Flat File Format 1.0 (SIZ) to Flat File Format 2.0 (CIZ)
An overview of known differences and new features between the new Flat File Format 2.0 (CIZ) and CRSPAccess (FIZ) Legacy Files
A guide for transitioning from CRSPAccess (FIZ) to Flat File Format 2.0 (CIZ)
Definitions, calculations, methodologies, coding schemes, and database structures for CRSPAccess (FIZ) Stock & Indexes
A detailed user guide for Flat File Format 1.0 (SIZ)
Additional notes and FAQ about this product
The difference is clear.
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