English, Article edition: Measuring Event Risk Peter Nyberg; Anders Wilhelmsson

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Physical Description
  • article
Language
  • English

Edition details

Title
  • Measuring Event Risk
Author
  • Peter Nyberg
  • Anders Wilhelmsson
Physical Description
  • article
Notes
  • This paper decomposes the popular risk measure Value-at-Risk (VaR) into one jump- and one continuous component. The continuous component corresponds to general market risk and the jump component is proportional to the event risk as defined in the Basel II accord. We find that event risk, which is currently not incorporated into most banks' VaR models, comprises a substantial part of total VaR. It constitutes 30% of the risk for a portfolio of small cap stocks but less than 1% for a portfolio of large cap stocks. The national supervising agency in each membership country is advised by the Basel rules to add an additional capital charge to a bank whose models do not capture event risk. The large variation in event risk, also found across 10 individual stocks, suggests that an approach that varies the capital surcharge, based on the type of asset, should be used by the supervisors. Copyright The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org., Oxford University Press.
  • RePEc:oup:jfinec:v:7:y:2009:i:3:p:265-287
Language
  • English
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