Bank supervisors have long recognized two types of shortcomingsin the Basle Accord’s risk-based capital (RBC)framework. First, the regulatory measures of “capital” maynot represent a bank’s true capacity to absorb unexpectedlosses. Deficiencies in reported loan loss reserves, forexample,...

Liberalization and deregulation have recently accelerated.It is therefore useful to keep risk within a certain level inrelation to capital, considering that financial institutionsmust control their risk appropriately to maintain thesafety and soundness of their operation. In 1988, the...

In this paper we examine the problem of partially hedging a given credit risk exposure. We derive hedges which satisfy certain optimality criteria: For a given investment into the hedge they minimize the remaining risk, or vice versa. This is motivated by the fact that it is a core business of...

Starting from the Merton framework for firm defaults, we provide theanalytics and robustness of the relationship between defaultprobabilities and default correlations. We show that loans with higherdefault probabilities will not only have higher variances but also highercorrelations with other...

This paper solves the intertemporal investment problem of an investor holding a portfolio of default-free and defaultable bonds.

In den letzten Jahren hat eine intensive Entwicklung von Kreditderivaten begonnen.Im Kern soll hiermit die Möglichkeit geschaffen werden, das Adressenrisiko einer Transaktion von ihrem Marktrisiko zu separieren und es damit einzeln handelbar, aber insbesondere auch hedgebar zu machen. Die...

Im Mittelpunkt dieses Beitrag stehen Verweildauermodelle und deren Verwendung als Analyseinstrumente für die Bewertung und Berechnung von Kreditausfallrisiken. Verschiedene Möglichkeiten zur Berechnung der Dauer des Nichtausfalls eines Kredites werden dabei vorgestellt. Die hier vorgestellten...

In this paper we present a tree model for defaultable bond prices which can be used for the pricing of credit derivatives. The model is based upon the two-factor Hull-White (1994) model for default-free interest rates, where one of the factors is taken to be the credit spread of the defaultable...

The aim of this paper is the valuation and hedging of defaultable bonds and options on defaultable bonds. The Heath/Jarrow/Morton-framework is used to model the interest rate risk, and the time of default is determined by the first jump time of a point process. (...)