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Vigilant measures of risk and the demand for contingent claims
Journal article   Peer reviewed

Vigilant measures of risk and the demand for contingent claims

Mario Ghossoub
Insurance, mathematics & economics, Vol.61, pp.27-35
03/01/2015
DOI: 10.1016/j.insmatheco.2014.11.009

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Abstract

We examine a class of utility maximization problems with a non-necessarily law-invariant utility, and with a non-necessarily law-invariant risk measure constraint. Under a consistency requirement on the risk measure that we call Vigilance, we show the existence of optimal contingent claims, and we show that such optimal contingent claims exhibit a desired monotonicity property. Vigilance is satisfied by a large class of risk measures, including all distortion risk measures and some classes of robust risk measures. As an illustration, we consider a problem of optimal insurance design where the premium principle satisfies the vigilance property, hence covering a large collection of commonly used premium principles, including premium principles that are not law-invariant. We show the existence of optimal indemnity schedules, and we show that optimal indemnity schedules are nondecreasing functions of the insurable loss.
Choquet integral Distorted probabilities Monotone Likelihood Ratio Optimal insurance design Utility maximization

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