Modeling the portfolio credit risk is one of the crucial issues of the last yearsin the financial problems. We propose the valuation model of Collateralized DebtObligations based on a one- and two-parameter copula and default intensities estimatedfrom market data. The presented method is used to...

We investigate the problem of modeling defaults of dependent credits.In the framework of the class of structural default models we studythreshold models where for each credit the underling ability-to-payprocess is a transformation of a Wiener processes. We propose a modelfor dependent defaults...

We study the risk of holding credit default swaps (CDS) in the trading book. In particular, wecompare the Value at Risk (VaR) of a CDS position to the VaR for investing in the respectivefirm’s equity. Our sample consists of CDS – stock price pairs for 86 actively traded firms overthe period...

In order to analyze the pricing of portfolio credit risk – as revealed by tranche spreadsof a popular credit default swap (CDS) index – we extract risk-neutral probabilities ofdefault (PDs) and physical asset return correlations from single-name CDS spreads. Thetime profile and overall level...

This is study empirically examine the impact of market conditions on credit spreads asmotivated by recently developed structural credit risk models. Using credit default swap(CDS) spreads, we find that, in the time series, average credit spreads are decreasing inGDP growth rate, but increasing...

We study how the interaction of agents with different beliefs about a firm’s future cash flows determines the jointbehavior of credit spreads, option implied volatilities, and stock returns. Beliefs heterogeneity influences the pricing kernelin a way that supports more realistic credit spreads...

This paper provides, and empirically estimates, a model of sovereign default risk on external debt,in which the sovereign endogenously determines the timing of defaulting. The paper o¤ers theoreticalpredictions of the relationship between credit spreads and related macro-variables that are...

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...

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. (...)

The authors develop a simple binomial model of liquidity and credit risk in which a bondholder has the option to time the sale of his security, given a distribution of potential buyers, bids and liquidity shocks.