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Increases in Risk Aversion and Portfolio Choice in a Complete Market

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Abstract

This note examines the effect of changes in risk aversion on the optimal portfolio choice in a complete market. It is shown that an agent who is less risk averse in the Pratt (1964) sense than another will choose a portfolio whose payoff is distributed as the other's payoff plus a nonnegative random variable plus conditional-mean-zero noise. The proof of the result uses simple first order conditions and basic results from stochastic dominance.

Suggested Citation

  • Philip H. Dybvig, 1988. "Increases in Risk Aversion and Portfolio Choice in a Complete Market," Cowles Foundation Discussion Papers 859, Cowles Foundation for Research in Economics, Yale University.
    • Handle: RePEc:cwl:cwldpp:859
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    References listed on IDEAS

    as
    1. Ross, Stephen A, 1981. "Some Stronger Measures of Risk Aversion in the Small and the Large with Applications," Econometrica, Econometric Society, vol. 49(3), pages 621-638, May.
    2. Kihlstrom, Richard E & Romer, David & Williams, Steve, 1981. "Risk Aversion with Random Initial Wealth," Econometrica, Econometric Society, vol. 49(4), pages 911-920, June.
    3. Hadar, Josef & Russell, William R, 1969. "Rules for Ordering Uncertain Prospects," American Economic Review, American Economic Association, vol. 59(1), pages 25-34, March.
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