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

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:

  • Executive Summary of Differences: summarizes differences between Flat File Format 1.0 (SIZ and Flat File Format 2.0 (CIZ), including easier and faster tabulation, file restructuring, new data items, new flag items for delists, distributions, and share codes, and metadata files.
  • User Guide: provides a table-by-table listing of data items in Flat File Format 2.0 (CIZ) and short definitions.
  • Cross Reference Guide: assists in transitioning from Flat File Format 1.0 (SIZ) and access tools through a high-level description of files and tables drawing relationships between SIZ and CIZ data items.
  • CRSP Metadata Guide: There are 10 metadata files included in Flat File Format 2.0 (CIZ) including schema information, flag files, coverage files, and calendar files, and SIZ to CIZ mapping information.
  • Release Notes: summarize monthly, quarterly and annual data updates
  • CRSP Calculations & Index Methodologies Guide: A detailed guide of calculations and methodologies for File Format 2.0 (CIZ).

CRSP Access

CRSPAccess files are also scheduled to be sunset after the December 2024 data cut is released in January.

Questions?

Please contact your support representative at support@crsp.org with questions.

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