In this paper, we apply Markowitz's approach of portfolio selection to government bond portfolios. As a main feature of our analysis, we use term structure models to estimate expected returns, return variances, and covariances of different bonds. Our empirical study for the German market shows...

We provide evidence of a strong effect of the underlying stock's illiquidity on option prices by showing that the average absolute difference between historical and implied volatility increases with stock illiquidity. This pattern translates into significant excess returns of option trading...

Rationale Anleger sind im Allgemeinen risikoavers. Eine wichtige Implikation dieser Risikoaversion ist, dass Anleger für bestimmte Risiken, die sie eingehen, eine Kompensation verlangen – Risikoprämien. Ein Beispiel für solche Risikoprämien sind Momentenrisikoprämien. Sie sind definiert...

The thesis studies index and equity option returns in perfect and imperfect markets to explain parts of the option mispricing puzzle. Perfect markets exist under informational efficiency, market completeness and frictionless trading. The thesis shows that an option-implied risk-adjusted approach...

This paper re-examines two volatility-related patterns in the cross-section of stock option returns: the low-volatility effect and the expensiveness effect. Intermediary asset pricing theory suggests specific linkages between these effects. As our empirical results show, the low-volatility...

This paper serves two purposes. First, we introduce a new data set on the German stock market which is publicly available to all researchers. It comprises factor returns (a market factor, a size factor, a book-to-market factor, and a momentum factor) as well as returns of portfolios which are...