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- Title
Evaluating Portfolio Policies: A Duality Approach.
- Authors
Haugh, Martin B.; Kogan, Leonid; Jiang Wang
- Abstract
The performance of a given portfolio policy can in principle be evaluated by comparing its expected utility with that of the optimal policy. Unfortunately, the optimal policy is usually not computable, in which case a direct comparison is impossible. In this paper, we solve this problem by using the given portfolio policy to construct an upper bound on the unknown maximum expected utility. This construction is based on a dual formulation of the portfolio optimization problem. When the upper bound is close to the expected utility achieved by the given portfolio policy, the potential utility loss of this policy is guaranteed to be small. Our algorithm can be used to evaluate portfolio policies in models with incomplete markets and position constraints. We illustrate our methodology by analyzing the static and myopic policies in markets with return predictability and constraints on short sales and borrowing.
- Subjects
UTILITY theory; ALGORITHMS; MATHEMATICAL optimization; SHORT selling (Securities); MARGIN accounts; INVESTMENTS; INVESTORS
- Publication
Operations Research, 2006, Vol 54, Issue 3, p405
- ISSN
0030-364X
- Publication type
Article
- DOI
10.1287/opre.1060.0279