ABSTRACT

In this paper we address the issue of finding an efficient and flexible numerical approach for calculating survival/default probabilities and pricing credit default swaps under advanced jump dynamics. We have chosen to use the firm value approach, modeling the firm's value by an exponential Lévy model. For this approach the default event is defined as the first passage of a barrier, and it is therefore possible to exploit a numerical technique developed to price barrier options under Lévy models to calculate the default probabilities. The method presented is based on the Fourier cosine series expansion of the underlying model's density function.