Since the equity premium as well as the risk-free rate puzzle question the concepts central to financial and economic modeling, we apply behavioral decision theory to asset pricing in view of solving these puzzles. U.S. stock market data for the period 1960-2003 and German stock market data for...

The ongoing debate concerning credit concentration risk is mainly driven by the requirements on credit risk management due to Pillar 2 of Basel II since risks (e.g. concentration risk) that are not fully captured by Pillar 1 should be adequately considered in the banks' risk management. This...

In the last decade, portfolio credit risk measurement has improved significantly. The current state-of-the-art models analyze the value of the portfolio at a certain risk horizon, e.g. one year. Most popular has become the Merton-type one-factor model of Vasicek, that builds the fundament of the...

Die Eigenkapitalunterlegungspflicht von Kreditgeschäften von Banken erfolgt mit der Einführung der im Juni 2004 verabschiedeten neuen Eigenkapitalrichtlinien (Basel II) maßgeblich auf Grundlage des durch den Kreditnehmer induzierten Verlustrisikos. Dies ermöglicht, die...

We consider investors with mean-variance-skewness preferences who aim at selecting one out of F different funds and combining it optimally with the riskless asset and direct stock holdings. Direct stock holdings are either exogenously or endogenously determined. In our theoretical section, we...

Im Rahmen des IRB-Basisansatzes sieht Basel II eine Risikominderung durch Kreditsicherheiten nur bezüglich einzelner Kredite vor. Da in der Bankpraxis durch die Sicherungszweckerklärung Kreditsicherheiten oftmals für mehrere Krediten abgestellt sind, ergibt sich ein Zuordnungsproblem, das...

Es wird dargelegt, dass das im Rahmen des Asset-Liability-Managements häufig gewählte Immunisierungsverfahren des Durationsmatch unter Verwendung der traditionellen Yieldbeta-Methode nur dann sachgerecht eingesetzt werden kann, wenn das betrachtete Unternehmen keinen sicheren realen und damit...

"Coherent" measures of a bank's whole risk capital imply a structure of a bank's optimal credit portfolio that is independent of its deposits and the expected deposit rate, of expected bankruptcy costs and of expected costs of regulatory capital. -- Basel II ; Regulatory Capital ; Coherent Risk...

We show analytically under quite general conditions that implied rates of return based on analysts' earnings forecasts are only a downward biased estimator for future expected one-period returns and therefore not suited for computing market risk premia. The extent of this bias is substantial as...

Several attempts have been made to reduce the impact of estimation errors on the optimal portfolio composition. On the one hand, improved estimators of the necessary moments have been developed and on the other hand, heuristic methods have been generated to enhance the portfolio performance, for...