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Analysis of risk bounds in partially specified additive factor models

L. Rüschendorf

Insurance: Mathematics and Economics, 2019, vol. 86, issue C, 115-121

Abstract: The study of worst case scenarios for risk measures (e.g. the Value at Risk) when the underlying risk vector (or portfolio of risks) is not completely specified is a central topic in the literature on robust risk measurement. In this paper we discuss partially specified factor models as introduced in Bernard et al. (2017) in more detail for the class of additive factor models which admit more explicit results. These results allow to describe in more detail the reduction of risk bounds obtainable by this method in dependence on the degree of positive resp. negative dependence induced by the systematic risk factors. The insight may help in applications of this reduction method to get a better qualitative impression on the range of influence of the partially specified factor structure.

Keywords: Risk factor models; Risk bounds; Dependence uncertainty; Value at risk; Model uncertainty (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1016/j.insmatheco.2019.02.007

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