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The Robustness of the CAPM-A Computational Approach

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Author Info
P. Jean-Jacques Herings (Universiteit Maastricht)
Felix Kubler (Yale University)

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Abstract

In this paper we argue that in realistically calibrated two period general equilibrium models with incomplete markets CAPM-pricing provides a good benchmark for equilibrium prices even when agents are not mean-variance optimizers and returns are not normally distributed. We numerically approximate equilibria for a variety of different specifications for preferences, endowments and dividends and compare the equilibrium prices and portfolio-holdings to the predictions of the CAPM. While the CAPM does not hold exactly for the chosen specification, it turns out that pricing-errors are extremely small. Furthermore, two-fund separation holds approximately.

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Paper provided by Econometric Society in its series Econometric Society World Congress 2000 Contributed Papers with number 0400.

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Date of creation: 01 Aug 2000
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Handle: RePEc:ecm:wc2000:0400

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  5. Kenneth L. Judd, 1997. "Computational Economics and Economic Theory: Substitutes or Complements," NBER Technical Working Papers 0208, National Bureau of Economic Research, Inc. [Downloadable!] (restricted)
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  6. Gottardi, Piero & Hens, Thorsten, 1996. "The Survival Assumption and Existence of Competitive Equilibria When Asset Markets are Incomplete," Journal of Economic Theory, Elsevier, vol. 71(2), pages 313-323, November. [Downloadable!] (restricted)
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  7. Feldstein, Martin S, 1969. "Mean-Variance Analysis in the Theory of Liquidity Preference and Portfolio Selection," Review of Economic Studies, Blackwell Publishing, vol. 36(105), pages 5-12, January. [Downloadable!] (restricted)
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