EconPapers    
Economics at your fingertips  
 

Minimum Variance Portfolio Optimisation under Parameter Uncertainty: A Robust Control Approach

Bertrand Maillet, Sessi Tokpavi () and Benoit Vaucher

No 2013-28, EconomiX Working Papers from University of Paris West - Nanterre la Defense, EconomiX

Abstract: The global minimum variance portfolio computed using the sample covariance matrix is known to be negatively affected by parameter uncertainty. Using a robust control approach, we introduce a portfolio rule for investors who wish to invest in the global minimum variance portfolio due to its strong historical track record but seek a rule that is robust to parameter uncertainty. Our robust portfolio theoretically corresponds to the global minimum variance portfolio in the worst-case scenario, with respect to a set of plausible alternative estimators of the covariance matrix, in the neighbourhood of the sample covariance matrix. Hence, it provides protection against errors in the reference sample covariance matrix. Monte Carlo simulations illustrate the dominance of the robust portfolio over its non-robust counterpart, in terms of portfolio stability, variance and risk-adjusted returns. Empirically, we compare the out-of-sample performance of the robust portfolio to various competing minimum variance portfolio rules in the literature. We observe that the robust portfolio often has lower turnover and variance and higher Sharpe ratios than the competing minimum variance portfolios.

Keywords: Global minimum variance portfolio; Parameter uncertainty; Robust control approach; Robust portfolio. (search for similar items in EconPapers)
JEL-codes: G11 D81 C44 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-rmg
Date: 2013
References: View references in EconPapers View complete reference list from CitEc
Citations Track citations by RSS feed

Downloads: (external link)
http://economix.fr/pdf/dt/2013/WP_EcoX_2013-28.pdf (application/pdf)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: http://EconPapers.repec.org/RePEc:drm:wpaper:2013-28

Access Statistics for this paper

More papers in EconomiX Working Papers from University of Paris West - Nanterre la Defense, EconomiX Contact information at EDIRC.
Series data maintained by Valerie Mignon ().

 
Page updated 2017-05-26
Handle: RePEc:drm:wpaper:2013-28