Friday, April 9, 2010

On the Necessity of Five Risk Measures

by Dominique Guégan and Wayne Tarrant:

Abstract: The banking systems that deal with risk management depend on underlying risk measures. Following the recommendation of the Basel II accord, most banks have developed internal models to determine their capital requirement. The Value at Risk measure plays an important role in computing this capital. In this paper we analyze in detail the errors produced by the use of this measure. We then discuss other measures, pointing out their strengths and shortcomings. We give detailed examples, showing the need for five risk measures in order to compute a capital in relation to the risk to which the bank is exposed. In the end we suggest using five different risk measures for computing capital requirements.

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