A Note on the Correlation Smile
15 Pages Posted: 23 Mar 2006
Date Written: December 2005
The correct modeling of default dependence is essential for the valuation of multiname credit derivatives. However for the pricing of synthetic CDOs a one-factor Gaussian copula model with constant and equal pairwise correlations, default intensities and recovery rates for all assets in the reference portfolio has become the standard market model. If this model were a reflection of market opinion there wouldn't be the implied correlation smile that is observed in the market. The purpose of this paper is to explain the structure of the smile by discussing the influence of different correlation matrices on CDO spreads.
Keywords: credit derivatives, CDOs, correlation smile
JEL Classification: G13
Suggested Citation: Suggested Citation