Antonelli, Fabio; Ramponi, Alessandro; Scarlatti, Sergio - 2021
In this paper we prove that the price of a defaultable bond, under a Vasicek short rate dynamic coupled with a Cox … intensity of the bond issuer. Employing conditioning and a change of num\'eraire technique, we obtain a manageable … representation of the bond price in this non-affine model which allows us to control its derivatives and assess the convergence of …