CRSP US Stock Databases

The database that started it all, a unique research source characterized by unmatched breadth and depth

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

Published: November 11, 2024

As communicated previously, CRSP is migrating to a new back office. This requires that subscribers migrate to the Stock & Indexes Flat File Format 2.0 (CIZ), which was made available in summer 2022. The December 2024 data which will be released in January 2025, is scheduled to be the last release of datasets produced in the Legacy (FIZ) and Flat File Format 1.0 (SIZ) formats. Subscribers may refer to several documents to become familiar with the Flat File Format 2.0 (CIZ) files.

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CRSP is renowned for its expertise in building and maintaining historical, academic, research-quality stock market databases.

Key Features

Documents & Resources

Flat File Format 2.0 User Guide

A table by table listing of data items with short definitions

CRSP Calculations & Index Methodologies

A detailed guide of calculations and methodologies for File Format 2.0 (CIZ)

Data Descriptions Guide

Definitions, calculations, methodologies, coding schemes, and database structures for Legacy (FIZ) Stock & Indexes

Flat File Format 2.0 Metadata Guide

Streamlines ingestion into proprietary systems and online tools

Cross Reference Guide

A guide for transitioning from Flat File Format 1.0 (SIZ) to Flat File Format 2.0 (CIZ)

Executive Summary

An overview of known differences between file formats and new features

Flat File Format 1.0 User Guide

Previous version of the user guide

Knowledge Base

Additional notes and FAQ about this product

Data Access Tools

Access information for this product

Release Notes

Monthly/Quarterly/Annual release notes

CRSP databases are characterized by their comprehensive corporate action information and highly accurate total return calculations.

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