Composition of Robust Equity Portfolios
نویسندگان
چکیده
Robust portfolios resolve the sensitivity issue identified as a concern in implementing mean-variance analysis. Because robust approaches are not widely used in practice due to a limited understanding regarding the portfolios constructed from these methods, we present an analysis of the composition of robust equity portfolios. We find that compared to the Markowitz mean-variance formulation, robust optimization formulations form portfolios that contain a fewer number of stocks, avoid large exposure to individual stocks, have higher portfolio beta, and show low correlation between weight and beta of the stocks composing the portfolio. These properties are also found for global minimum-variance portfolios.
منابع مشابه
What do robust equity portfolio models really do?
Most of previous work on robust equity portfolio optimization has focused on its formulation and performance. In contrast, in this paper we analyze the behavior of robust equity portfolios to determine whether reducing the sensitivity to input estimation errors is all robust models do and investigate any side-effects of robust formulations. Therefore, our focus is on the relationship between fu...
متن کاملModeling Dependence Structure and Forecasting Market Risk with Dynamic Asymmetric Copula∗
We investigate the dynamic and asymmetric dependence structure between equity portfolios from the US and UK. We demonstrate the statistical significance of dynamic asymmetric copula models in modelling and forecasting market risk. First, we construct “high-minus-low" equity portfolios sorted on beta, coskewness, and cokurtosis. We find substantial evidence of dynamic and asymmetric dependence b...
متن کاملCreating More Stable and Diversified Socially Responsible Investment Portfolios
This study is the first to apply a robust estimation technique when constructing Socially Responsible Investing (SRI) portfolios and to highlight that the selection of the optimisation process in this industry matters. We go beyond the mean-variance Markowitz framework in order to bypass issues surrounding the significant estimation risk that causes unstable, poorly diversified and suboptimal p...
متن کاملCommodity Risk Factors and the Cross-Section of Equity Returns
The article examines whether commodity risk is priced in the cross-section of equity returns. Alongside a long-only equally-weighted portfolio of commodity futures, we employ as an alternative commodity risk factor a term structure portfolio that captures the propensity of commodity futures markets to be backwardated or contangoed. Equity-sorted portfolios with greater sensitivities to the two ...
متن کاملPerformance of Portfolios Optimized with Estimation Error
We explain the poor out-of-sample performance of mean-variance optimized portfolios, developing theoretical bias adjustments for estimation risk by asymptotically expanding future returns of portfolios formed with estimated weights. We provide closed-form non-Bayesian adjustments of classical estimates of portfolio mean and standard deviation. The adjustments significantly reduce bias in intern...
متن کامل