Determining the Number of Priced State Variables in the ICAPM
Journal of Financial and Quantitative Analysis, Vol. 33, No. 2 (June, 1998), 217-231
Fama-Miller Working Paper
12 Pages Posted: 5 Mar 1997 Last revised: 20 Jan 2017
There are 3 versions of this paper
Determining the Number of Priced State Variables in the ICAPM
Determining the Number of Priced State Variables in the ICAPM
Date Written: November 1, 1997
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.
JEL Classification: G12
Suggested Citation: Suggested Citation
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