Modeling the portfolio credit risk is one of the crucial issues of the last years in the financial problems. We propose the valuation model of Collateralized Debt Obligations based on a one- and two-parameter copula and default intensities estimated from market data. The presented method is used...

Modelling portfolio credit risk is one of the crucial challenges faced by financial services industry in the last few years. We propose the valuation model of collateralized debt obligations (CDO) based on copula functions with up to three parameters, with default intensities estimated from...

This paper analyzes empirical market utility functions and pricing kernels derived from the DAX and DAX option data for three market regimes. A consistent parametric framework of stochastic volatility is used. All empirical market utility functions show a region of risk proclivity that is...

Market option prices in last 20 years confirmed deviations from the Black and Scholes (BS) models assumptions, especially on the BS implied volatility. Implied binomial trees (IBT) models capture the variations of the implied volatility known as volatility smile. They provide a discrete...

In this paper we consider the optimal stopping problem for general dynamic monetary utility functionals. Sufficient conditions for the Bellman principle and the existence of optimal stopping times are provided. Particular attention is payed to representations which allow for a numerical...

The spread risk premium component of credit default swap (CDS) spreads represents a compensation demanded by protection sellers for future changes in CDS spreads caused by unpredictable fluctuations in the reference entity"s risk-neutral default intensity. This paper defines and estimates a...

Outperformance-Zertifikate auf Aktienindizes in Fremdwährungsräumen Währungsgesicherte (Quanto-)Zertifikate auf internationale Indizes bieten Investoren teilweise eine deutlich höhere Performance als der jeweils zugrundeliegende Index erzielt. Diese vermeintliche Attraktivität von...

Steadily growing debt ratios indicate that current sovereign debt policy lacks important incentives for governments and politicians to fulfill it in a long-term sustainable way. To implement proper incentives, we propose the concept of performance-sensitive government bonds (PSGB) where coupon...

Extreme Börsenbewegung und Intraday-Preisstellung von Open-End-Turbo-Zertifikaten auf den DAX: Der Fall Kerviel Am 21. Januar 2008 ist der DAX als Folge der Fehlspekulation des Aktienhändlers Jérôme Kerviel bei der Société Générale über 7% eingebrochen. Seit Auflegung der ersten...

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...