Lionel Martellini is an Assistant Professor of Finance at the Marshall School of Business, University of Southern California. He holds Master's degrees in Business Administration, Economics, Statistics, and Mathematics, and a PhD in Finance (U.C. Berkeley). He conducts active research in derivatives pricing, credit risk analysis, and quantitative portfolio management and has served as a consultant in these fields for various other financial institutions, in particular ACT Financial Systems. Philippe Priaulet is the Head of Fixed Income Research at Credit Commercial de France (CCF -- Direction