Before revision: We propose a flexible and tractable approach based on affine processes to model multiple yield curves. More precisely, we model a numeraire process and multiplicative spreads between Libor rates and simply compounded OIS rates as functions of an underlying affine process.
After revision: We propose a flexible and tractable approach based on affine processes , be it short rate, Libor market, or HJM modeling, can be consolidated. We model a numeraire process and multiplicative spreads between Libor rates and simply compounded OIS rates as functions of an underlying affine process.