Enhanced Mean-Variance Portfolios - A Controlled Integration of Quantitative Return Estimates
Posted: 21 May 2019
Date Written: March 26, 2013
The intuitiveness and practicability of mean-variance portfolios largely depends on the accuracy of moment estimates, which are subject to large estimation errors and conditional on time. We propose a model accounting for factor dynamics in a Bayesian setting, in which the impact of estimation accuracy on the posterior distribution is endogenously derived from a linear predictive regression model. Thereby, we capture upside return potential for periods of high factor explained variance whilst constraining downside risk for periods of low predictive quality. Results are robust in a simulation and empirical setting.
Keywords: Bayesian portfolio construction, Black-Litterman, downside risk, enhanced indexing, goodness-of-fit, random sampling
JEL Classification: C11, C22, C53, C61, D24, G11, G12
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