2008•SSRN Electronic JournalOpen access

Optimal Delegated Portfolio Management with Background Risk

Alexandre M. Baptista

Abstract

Most investors delegate the management of a fraction of their wealth to portfolio managers who are given the task of beating a benchmark. However, in an influential paper [Roll, R., 1992. A mean/variance analysis of tracking error. Journal of Portfolio Management 18, 13-22] shows that the objective functions commonly used by these managers lead to the selection of portfolios that are suboptimal from the perspective of investors. In this paper, we provide an explanation for the use of these objective functions based on the effect of background risk on investors' optimal portfolios. Our main contribution is to provide conditions under which investors can optimally delegate the management of their wealth to portfolio managers.

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Key concepts: Delegate, Portfolio, Tracking error, Project portfolio management, Modern portfolio theory, Post-modern portfolio theory, Actuarial science, Benchmark (surveying)