BFS 2002

Contributed Talk

Modelling Dependent Defaults

Rüdiger Frey, Alexander McNeil

The talk is concerned with the modelling of dependence between defaults in current models for credit portfolio management. We clarify the mathematical structure of the existing industry models and provide links between them. We study the model risk due to an inappropriate modelling of the dependence between defaults inherent in various modelling approaches. Finally we discuss the calibration of several models to default data.