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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
User guide for Flat File Format 2.0 (CIZ) files with detailed table descriptions. Files are available in SAS, ASCII & R formats
A guide to the Flat File Format 2.0 (CIZ) metadata files which include more details about flags, coverage, calendars and CIZ to SIZ mapping
A detailed guide of calculations and methodologies for Flat File Format 2.0 (CIZ) files
Discover supported platforms for accessing CRSP data, including our Windows interface, flat file formats, command line tools and programming libraries, and several third-party partnerships
Monthly, quarterly, & annual release notes
An overview of known differences between Flat File Format 1.0 (SIZ) and Flat File Format 2.0 (CIZ) files
A guide for transitioning from Flat File Format 1.0 (SIZ) to Flat File Format 2.0 (CIZ) with general and detailed mappings
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)
User guide for legacy (FIZ) Stock & Index database including data definitions, CRSP calculations, index methodologies, code definitions and database structures
User guide for Flat File Format 1.0 (SIZ) files with detailed table descriptions. Files are available in SAS, ASCII & R formats
Additional notes and FAQ about this product
The difference is clear.
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