We have analysed in this article the risk-yield profile of the new DAXplus Covered- Call-Index of Deutsche Börse AG (German Stock Exchange) in the period from January 1993 to June 2005. It has turned out that, on a risk-adjusted basis, investing in DAXplus Covered Call Certificates was...

This paper investigates whether the stock market reacts to unsolicited ratings for a sample of S&P rated firms from January 1996 to December 2005. We first analyze the stock market reaction associated with the assignment of an initial unsolicited rating. We find evidence that this reaction is...

This paper examines why unsolicited ratings tend to be lower than solicited ratings. Both self-selection among issuers and strategic conservatism of rating agencies may be reasonable explanations. Analyses of default incidences of non-U.S. borrowers between January 1996 and December 2006 show...

Das Firmenkundensegment und die Präsenz auf den internationalen Märkten für gewerblichenHypothekarkredit und der Finanzierung öffentlicher Haushalte gewinnen für die deutschen Hypothekenbankenbis zum Jahr 2007 erheblich an Bedeutung, so das Ergebnis eines Forschungsprojektsder...

We develop a shrinkage theory based framework for determining optimal port-folio weight constraints for minimum-variance portfolios in presence of parameteruncertainty. We propose to impose the set of constraints that yields the opti-mal trade-o between sampling error reduction and bias for the...

This paper examines why unsolicited ratings tend to be lower than solicited ratings. Bothself-selection among issuers and strategic conservatism of rating agencies may be reasonableexplanations. Analyses of default incidences of non-U.S. borrowers between January 1996and December 2006 show that...

Das Firmenkundensegment und die Präsenz auf den internationalen Märkten für gewerblichen Hypothekarkredit und der Finanzierung öffentlicher Haushalte gewinnen für die deutschen Hypothekenbanken bis zum Jahr 2007 erheblich an Bedeutung, so das Ergebnis eines Forschungsprojekts der...