Mean-variance problem for an insurer with default risk under a jump-diffusion risk model |
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Authors: | Suxin Wang Ximin Rong |
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Institution: | 1. School of Mathematics, Tianjin University, Tianjin, China;2. Center for Applied Mathematics, Tianjin University, Tianjin, China |
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Abstract: | AbstractThis paper considers an optimal investment-reinsurance problem with default risk under the mean-variance criterion. We assume that the insurer is allowed to purchase proportional reinsurance and invest his/her surplus in a risk-free asset, a stock and a defaultable bond. The goal is to maximize the expectation and minimize the variance of the terminal wealth. We first formulate the problem to stochastic linear-quadratic (LQ) control problem with constraints. Then the optimal investment-reinsurance strategies and the corresponding value functions are obtained via the viscosity solutions of Hamilton-Jacobi-Bellman (HJB) equations for the post-default case and pre-default case, respectively. Finally, we provide numerical examples to illustrate the effects of model parameters on the optimal strategies and value functions. |
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Keywords: | Defaultable bond investment and reinsurance mean-variance criterion viscosity solution Hamilton-Jacobi-Bellman equation |
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