Worst VaR Scenarios
نویسندگان
چکیده
The worst-possible Value-at-Risk for a non-decreasing function of dependent risks is known when or the copula of the portfolio is bounded from below. In this paper we analyze the properties of the dependence structures leading to this solution, in particular their form and the implied functional dependence between the marginals. Furthermore, we criticise the assumption of the worst-possible scenario for VaR-based risk management and we provide an alternative approach supporting comonotonicity.
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