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WRDS Research Webinar Series – Flat File Format 2.0 (CIZ)

We are delighted to invite Ph.D. students, faculty members, and friends to a WRDS webinar on the newly released CRSP CIZ (Version 2) data format. As of December 2024, CRSP has fully retired the SIZ (Version 1) structure, making this transition essential for anyone working with CRSP equities data. The session will address some of the common questions researchers have raised during the transition, on both data structure and data value comparison.

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News & Updates

CRSP Market Indexes Notification – Changes to Index Governance

Beginning July 1, 2026, governance of the CRSP Market Indexes will transition to the standard Morningstar Indexes Governance framework, replacing the governance authorities and procedures currently outlined in the CRSP [...]

CRSP Market Indexes Breakpoints for Q1 2026

CRSP Market Indexes (CRSPMI) announces the market cap breakpoints and effective ranking dates for its March 2026 quarterly index rebalancing. [...]

CRSP Has Moved to Morningstar Headquarters Office

As of Monday, February 2, 2026, CRSP offices are now located at: 22 W. Washington St., Chicago, IL US Phone: +1 312-384-3735 Please update our contact information in your systems. [...]

CRSP Market Indexes Notification – Changes to Float Shares Investability Screen

Float Shares Investability Screen will be expanded to include a float-adjusted market capitalization test for adding or dropping a security. Below is the table outlining the existing and the new [...]

CRSP Count™ Quarterly Update – December 2025

Using CRSP Market Indexes Methodology, CRSP Count™ tracks changes in the number of securities by market cap segments - Mega, Mid, Small and Micro - through time. [...]

CRSP Market Indexes US Market Update – Q4 2025

Notable items with this release include:
- December returns were fairly flat for Cap and Style Indexes
- Value outperformed Growth across the board in Q4, however, [...]

2026 CRSP Market Indexes Methodology Guide

The 2026 CRSP Market Indexes Methodology Guide is now available. [...]

CRSP Market Indexes Breakpoints for Q4 2025

CRSP Market Indexes (CRSPMI) announces the market cap breakpoints and effective ranking dates for its December 2025 quarterly index rebalancing. [...]

What’s New in CRSP’s September Ranking?

We’ve updated our methodology to exclude Passive Foreign Investment Companies (PFICs) from our CRSP Market Indexes—helping mitigate tax implications and improve investor outcomes. [...]
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