Tail mutual exclusivity and Tail-VaR lower bounds

Ka Chun Cheung, Michel Denuit and Jan Dhaene

Scandinavian Actuarial Journal, 2017, vol. 2017, issue 1, 88-104

Abstract: In this paper, we extend the concept of mutual exclusivity proposed by [Dhaene, J. & Denuit, M. (1999). The safest dependence structure among risks. Insurance: Mathematics and Economics 25, 11–21] to its tail counterpart and baptize this new dependency structure as tail mutual exclusivity. Probability levels are first specified for each component of the random vector. Under this dependency structure, at most one exceedance over the corresponding Value-at-Risks (VaRs) is possible, the other components being zero in such a case. No condition is imposed when all components stay below the VaRs. Several properties of this new negative dependence concept are derived. We show that this dependence structure gives rise to the smallest value of Tail-VaR (TVaR) of a sum of risks within a given Fréchet space, provided that the probability level of the TVaR is close enough to one.

Date: 2017
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Related works:
Working Paper: Tail mutual exclusivity and Tail-VaR lower bounds (2017)
Working Paper: Tail mutual exclusivity and Tail-VaR lower bounds (2015)
Working Paper: Tail mutual exclusivity and tail-var lower bounds (2015)
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DOI: 10.1080/03461238.2015.1084945

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