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Correspondence between Lifetime Minimum Wealth and Utility of Consumption

Erhan Bayraktar·Virginia R. Young
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Abstract

We establish when the two problems of minimizing a function of lifetime minimum wealth and of maximizing utility of lifetime consumption result in the same optimal investment strategy on a given open interval $O$ in wealth space. To answer this question, we equate the two investment strategies and show that if the individual consumes at the same rate in both problems -- the consumption rate is a control in the problem of maximizing utility -- then the investment strategies are equal only when the consumption function is linear in wealth on $O$, a rather surprising result. It, then, follows that the corresponding investment strategy is also linear in wealth and the implied utility function exhibits hyperbolic absolute risk aversion.

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Erhan Bayraktar, Virginia R. Young. 2007-03-27. Correspondence between Lifetime Minimum Wealth and Utility of Consumption. https://arxiv.org/abs/math/0703820

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