Fluctuation Analysis for the Loss from Default
by Konstantinos Spiliopoulos of Boston University,
May 30, 2013
Abstract: We analyze the fluctuation of the loss from default around its large portfolio limit in a class of reduced-form models of correlated firm-by-firm default timing. We prove a weak convergence result for the fluctuation process and use it for developing a conditionally Gaussian approximation to the loss distribution. Numerical results illustrate the accuracy and computational efficiency of the approximation.