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Research Papers

Our experts have published extensively in peer-reviewed journals. Pre-publication versions of these papers plus other working papers are available below.

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Robust Portfolio Optimization with VaR Adjusted Sharpe Ratio

By: Geng Deng, Tim Dulaney, Craig McCann, and Olivia Wang

We propose a robust portfolio optimization approach based on Value-at-Risk (VaR) adjusted Sharpe ratios. Traditional Sharpe ratio estimates using a limited series of historical returns are subject to estimation errors. Portfolio optimization based on traditional Sharpe ratios ignores this uncertainty and, as a result, is not robust. In this paper, we propose a robust portfolio optimization model that selects the portfolio with the largest worse-case-scenario Sharpe ratio within a given...

Are VIX Futures ETPs Effective Hedges?

By: Geng Deng, Craig McCann, and Olivia Wang

Exchange-traded products (ETPs) linked to futures contracts on the CBOE S&P 500 Volatility Index (VIX) have grown in volume and assets under management in recent years, in part because of their perceived potential to hedge against stock market losses.

In this paper we study whether VIX-related ETPs can effectively hedge a portfolio of stocks. We find that while the VIX increases when large stock market losses occur, ETPs which track short term VIX futures indices are not effective hedges...

CLOs, Warehousing, and Banc of America's Undisclosed Losses

By: Tim Husson, Craig McCann, and Olivia Wang

Collateralized Loan Obligations (CLOs) are issued by trusts which in turn invest the proceeds from issuing the CLO securities in portfolios of bank loans. This note explains the conflicts of interest created when an investment bank accumulates loans for potential securitization prior to the issuance of a CLO through a practice known as 'warehousing.' Warehousing appears to have resulted in some CLO trusts issuing securities without disclosing to investors that the securities had lost almost...

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