Working Papers,
Lund University, Department of Economics

Abstract: This paper looks at the asset correlation bias resulting from firms’ assets and liabilities being denominated in different currencies. It focuses on the time-variation in the bias and on the dependency of the bias on currency movements. Both the volatility of the exchange rate and the correlations between the asset values and the exchange rate affect the bias and we find the sensitivity of the bias to the former to be greatest. Despite this, and as a result of the wide fluctuations of the asset value - exchange rate correlations over the last ten to fifteen years, the asset value - exchange rate correlation’s net effect on the bias is more significant, economically. Overall, we find that the asset correlation bias for the average pair of firms in the Dow Jones Industrial Average index is significant for the better part of the 2000-2013 time period. The bias fluctuates widely, however, and it has turned negative for shorter periods. The policy implication of the paper is that by ignoring the exchange rate component when computing portfolio credit risk one may materially underestimate the actual risk. Particularly at times of frequent and significant exchange rate movements.

Keywords: asset correlation; time-variation; sensitivity; exchange rate; currency risk

JEL-codes: F31; G10; G15; G21; G33

17 pages, October 2, 2013

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WP13_33.pdf  

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