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Uncertainty aversion and the optmal choice of portfolio

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  • Dow, James
  • Werlang, Sérgio Ribeiro da Costa

Abstract

In this paper we apply the theory of declsion making with expected utility and non-additive priors to the choice of optimal portfolio. This theory describes the behavior of a rational agent who i5 averse to pure 'uncertainty' (as well as, possibly, to 'risk'). We study the agent's optimal allocation of wealth between a safe and an uncertain asset. We show that there is a range of prices at which the agent neither buys not sells short the uncertain asset. In contrast the standard theory of expected utility predicts that there is exactly one such price. We also provide a definition of an increase in uncertainty aversion and show that it causes the range of prices to increase.

Suggested Citation

  • Dow, James & Werlang, Sérgio Ribeiro da Costa, 1988. "Uncertainty aversion and the optmal choice of portfolio," FGV EPGE Economics Working Papers (Ensaios Economicos da EPGE) 115, EPGE Brazilian School of Economics and Finance - FGV EPGE (Brazil).
    • Handle: RePEc:fgv:epgewp:115
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    Cited by:

    1. Camerer, Colin & Weber, Martin, 1992. "Recent Developments in Modeling Preferences: Uncertainty and Ambiguity," Journal of Risk and Uncertainty, Springer, vol. 5(4), pages 325-370, October.

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