Ebnöther, Silvan; Vanini, Paolo - Institut für Schweizerisches Bankwesen <Zürich> - 2005
Economic cycles are the key credit portfolio risk driver and they are autocorrelated over time. We then show that it is … economically meaningful to define risk for credit portfolios in a multi period setup. Since one period expected shortfall fails to … measure risk adequately in a multi period context, we then extend the coherent expected shortfall to time-conditional expected …