A First Look at the Accuracy of the Crsp Mutual Fund Database and a Comparison of the Crsp and Morningstar Mutual Fund Databases

16 Pages Posted: 13 Nov 2008

See all articles by Edwin J. Elton

Edwin J. Elton

New York University (NYU) - Department of Finance

Martin J. Gruber

New York University (NYU) - Department of Finance

Christopher R. Blake

Fordham University - Gabelli School of Business

Multiple version iconThere are 4 versions of this paper

Date Written: 2001

Abstract

This paper examines problems in the CRSP Survivor Bias Free U.S. Mutual Fund Database (CRSP, 1998) and compares returns contained in it to those in Morningstar. The CRSP database has an omission bias that has the same effects as survivorship bias. Although all mutual funds are listed in CRSP, return data is missing for many and the characteristics of these funds differ from the populations. The CRSP return data is biased upward and merger months are inaccurately recorded about half the time. Differences in returns in Morningstar and CRSP are a problem for older data and small funds.

Suggested Citation

Elton, Edwin J. and Gruber, Martin J. and Blake, Christopher R., A First Look at the Accuracy of the Crsp Mutual Fund Database and a Comparison of the Crsp and Morningstar Mutual Fund Databases (2001). NYU Working Paper No. S-AM-01-09. Available at SSRN: https://ssrn.com/abstract=1300806

Edwin J. Elton (Contact Author)

New York University (NYU) - Department of Finance ( email )

44 West 4th Street
Ste 9-190
New York, NY 10012-1126
United States
212-998-0361 (Phone)
212-995-4233 (Fax)

Martin J. Gruber

New York University (NYU) - Department of Finance ( email )

44 West 4th Street
Ste 9-190
New York, NY 10012-1126
United States
212-998-0333 (Phone)
212-995-4233 (Fax)

Christopher R. Blake

Fordham University - Gabelli School of Business ( email )

113 West 60th Street
Lowenstein Building
New York, NY 10023
United States
212-636-6750 (Phone)

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