Die versteckten Risiken von Value at Risk

Research Seminare

Value at risk (VaR) has become a standard measure of portfolio risk over the last decade. It evenbecame one of the corner stones in the Basel II accord about banks’ equity requirements. Nevertheless,the practical application of the VaR concept suffers from two problems: how to estimate VaR and how to optimize a portfolio for a given level of VaR? For the first problem, several approaches have been suggested including the historical simulation method. The optimization problem can be tackled using recent advances in heuristic optimization algorithms. However, our application to bond portfolios shows that a solution to the two aforementioned problems gives raise to a third one: the actual VaR of bond portfolios optimized under a VaR constraint might exceed its nominal level to a large extent. Thus, optimizing bond portfolios under a VaR constraint might increase risk. This finding is of relevance notonly for investors, but even more so for bank regulation authorities.
<HTML>Paper-Download</HTML>

Einheit

Personen

Prof. Dr. Dietmar Maringer

Dietmar Maringer // Universität Basel

Kontakt

Research Associate, Ralf Wilke
Zum Profil

Anfahrt

Institutsadresse

maps

Klicken Sie auf den unteren Button, um den Inhalt nachzuladen. (Ich bin damit einverstanden, dass mir externe Inhalte angezeigt werden. Mehr dazu in unserer Datenschutzerklärung.)

,
  • Raum Straßburg