Abstract

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Determining the Number of Priced State Variables in the ICAPM


Eugene F. Fama


University of Chicago - Finance

November 1997

Center for Research in Security Prices (CRSP) Working Paper No. 447

Abstract:     
Suppose the ICAPM governs asset prices, and there are a total of S state variables that might be of hedging concern to investors. Can we determine which state variables are in fact of hedging concern? What does it mean to say that these state variables are priced, that is, that they give rise to special risk premiums in expected returns? The goal of this paper is to formulate this problem clearly and show when it can and cannot be solved. Ignoring estimation problems, it is possible to find the set of priced state variables when the state variables are identified (named). When we know the number of state variables but not their names, confident conclusions about even the number of them that produce special risk premiums are probably impossible, unless the number is zero, so the ICAPM collapses to the CAPM.

Number of Pages in PDF File: 21

JEL Classification: G12

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Date posted: March 5, 1997  

Suggested Citation

Fama, Eugene F., Determining the Number of Priced State Variables in the ICAPM (November 1997). Center for Research in Security Prices (CRSP) Working Paper No. 447. Available at SSRN: http://ssrn.com/abstract=15515 or http://dx.doi.org/10.2139/ssrn.15515

Contact Information

Eugene F. Fama (Contact Author)
University of Chicago - Finance ( email )
5807 S. Woodlawn Avenue
Chicago, IL 60637
United States
773-702-7282 (Phone)
773-702-9937 (Fax)
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