Title
Robustness to Dependency in Portfolio Optimization Using Overlapping Marginals
Abstract
AbstractIn this paper, we develop a distributionally robust portfolio optimization model where the robustness is across different dependency structures among the random losses. For a Fréchet class of discrete distributions with overlapping marginals, we show that the distributionally robust portfolio optimization problem is efficiently solvable with linear programming. To guarantee the existence of a joint multivariate distribution consistent with the overlapping marginal information, we make use of a graph theoretic property known as the running intersection property. Building on this property, we develop a tight linear programming formulation to find the optimal portfolio that minimizes the worst-case conditional value-at-risk measure. Lastly, we use a data-driven approach with financial return data to identify the Fréchet class of distributions satisfying the running intersection property and then optimize the portfolio over this class of distributions. Numerical results in two different data sets show that the distributionally robust portfolio optimization model improves on the sample-based approach.
Year
DOI
Venue
2015
10.1287/opre.2015.1424
Periodicals
Keywords
Field
DocType
distributionally robust optimization,portfolio optimization,overlapping marginals
Graph,Mathematical optimization,Data set,Linear programming formulation,Robustness (computer science),Portfolio,Portfolio optimization,Multivariate normal distribution,Linear programming,Mathematics
Journal
Volume
Issue
ISSN
63
6
0030-364X
Citations 
PageRank 
References 
8
0.52
24
Authors
3
Name
Order
Citations
PageRank
Xuan Vinh Doan1807.42
Xiao-bo Li2257.76
Karthik Natarajan340731.52