VAR and CTE Criteria for Optimal Quota-Share and Stop-Loss Reinsurance |
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| Authors: | Ken Seng Tan ASA CERA PhD Chengguo Weng Yi Zhang PhD |
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| Institution: | 1. Quantitative Risk Management in the Department of Statistics and Actuarial Science , University of Waterloo , Waterloo, Ontario, Canada N2L 3G1 , Canada;2. China Institute for Actuarial Science , Central University of Finance and Economics , Beijing , China;3. Department of Mathematics , Towson University , Towson, MD, 21252;4. Department of Mathematics , Zhejiang University , Hangzhou, 310027 , China |
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| Abstract: | Abstract It is well known that reinsurance can be an effective risk management tool for an insurer to minimize its exposure to risk. In this paper we provide further analysis on two optimal reinsurance models recently proposed by Cai and Tan. These models have several appealing features including (1) practicality in that the models could be of interest to insurers and reinsurers, (2) simplicity in that optimal solutions can be derived in many cases, and (3) integration between banks and insurance companies in that the models exploit explicitly some of the popular risk measures such as value-at-risk and conditional tail expectation. The objective of the paper is to study and analyze the optimal reinsurance designs associated with two of the most common reinsurance contracts: the quota share and the stop loss. Furthermore, as many as 17 reinsurance premium principles are investigated. This paper also highlights the critical role of the reinsurance premium principles in the sense that, depending on the chosen principles, optimal quota-share and stop-loss reinsurance may or may not exist. For some cases we formally establish the sufficient and necessary (or just sufficient) conditions for the existence of the nontrivial optimal reinsurance. Numerical examples are presented to illustrate our results. |
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