Weighted sums of subexponential random variables and asymptotic dependence between returns on reinsurance equities
AbstractSuppose are independent subexponential random variables with partial sums. We show that if the pairwise sums of the âs are subexponential, then is subexponential and . The result is applied to give conditions under which as , where are constants such that is a.s. convergent. Asymptotic tail probabilities for bivariate linear combinations of subexponential random variables are given. These results are applied to explain the joint movements of the stocks of reinsurers. Portfolio investment and retrocession practices in the reinsurance industry expose different reinsurers to the same subexponential risks on both sides of their balance sheets. This implies that reinsurerâs equity returns can be asymptotically dependent, exposing the industry to systemic risk. Published in Insurance, Mathematics and Economics . (2006, 38, 39-56.)
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Bibliographic InfoArticle provided by Elsevier in its journal Insurance: Mathematics and Economics.
Volume (Year): 38 (2006)
Issue (Month): 1 (February)
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Web page: http://www.elsevier.com/locate/inca/505554
Other versions of this item:
- J.L. Geluk & C.G. de Vries, 2004. "Weighted Sums of Subexponential Random Variables and Asymptotic Dependence between Returns on Reinsurance Equities," Tinbergen Institute Discussion Papers, Tinbergen Institute 04-102/2, Tinbergen Institute.
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