The level and quality of Value-at-Risk disclosure by commercial banks
نویسندگان
چکیده
In this paper we study both the level of Value-at-Risk (VaR) disclosure and the accuracy of the disclosed VaR figures for a sample of US and international commercial banks. To measure the level of VaR disclosures, we develop a VaR Disclosure Index that captures many different facets of market risk disclosure. Using panel data over the period 1996–2005, we find an overall upward trend in the quantity of information released to the public. We also find that Historical Simulation is by far the most popular VaR method. We assess the accuracy of VaR figures by studying the number of VaR exceedances and whether actual daily VaRs contain information about the volatility of subsequent trading revenues. Unlike the level of VaR disclosure, the quality of VaR disclosure shows no sign of improvement over time. We find that VaR computed using Historical Simulation contains very little information about future volatility. 2009 Elsevier B.V. All rights reserved. ‘‘Disclosure of quantitative measures of market risk, such as valueat-risk is enlightening only when accompanied by a thorough discussion of how the risk measures were calculated and how they related to actual performance”. Greenspan (1996)
منابع مشابه
domestic and international regulations and standards for risk disclosure in banks
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