On Multivariate Extensions of Value-at-Risk
AbstractIn this paper, we introduce two alternative extensions of the classical univariate Value-at-Risk (VaR) in a multivariate setting. The two proposed multivariate VaR are vector-valued measures with the same dimension as the underlying risk portfolio. The lower-orthant VaR is constructed from level sets of multivariate distribution functions whereas the upper-orthant VaR is constructed from level sets of multivariate survival functions. Several properties have been derived. In particular, we show that these risk measures both satisfy the positive homogeneity and the translation invariance property. Comparison between univariate risk measures and components of multivariate VaR are provided. We also analyze how these measures are impacted by a change in marginal distributions, by a change in dependence structure and by a change in risk level. Illustrations are given in the class of Archimedean copulas.
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Bibliographic InfoPaper provided by arXiv.org in its series Papers with number 1111.1349.
Date of creation: Nov 2011
Date of revision: Apr 2013
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This paper has been announced in the following NEP Reports:
- NEP-ALL-2011-11-14 (All new papers)
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