Continuous-Time Portfolio Choice Under Monotone Mean-Variance Preferences-Stochastic Factor Case

Jakub Trybu{\l}a and Dariusz Zawisza

Papers from arXiv.org

Abstract: We consider an incomplete market with a nontradable stochastic factor and a continuous time investment problem with an optimality criterion based on monotone mean-variance preferences. We formulate it as a stochastic differential game problem and use Hamilton-Jacobi-Bellman-Isaacs equations to find an optimal investment strategy and the value function. What is more, we show that our solution is also optimal for the classical Markowitz problem and every optimal solution for the classical Markowitz problem is optimal also for the monotone mean-variance preferences. These results are interesting because the original Markowitz functional is not monotone, and it was observed that in the case of a static one-period optimization problem the solutions for those two functionals are different. In addition, we determine explicit Markowitz strategies in the square root factor models.

Date: 2014-03, Revised 2020-01
New Economics Papers: this item is included in nep-upt
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Published in Mathematics of Operations Research 44 (2019), 966-987

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