The most important result in this working paper is the construction of a multidimensional Gaussian interest-rate term structure model, where, based on a construction of equivalent martingale measures and a suitable selection of numerators, it is shown that it is possible to derive analytical...

The recent financial crisis has led to so-called multi-curve models for the term structure. Here we study a multi-curve extension of short rate models where, in addition to the short rate itself, we introduce short rate spreads. In particular, we consider a Gaussian factor model where the short...