A BSDE approach to a class of dependent risk model of mean-variance insurers with stochastic volatility and no-short selling

A BSDE approach to a class of dependent risk model of mean-variance insurers with stochastic volatility and no-short selling
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具有随机波动性和无卖空的均值方差保险公司的一类相关风险模型的 BSDE 方法

DOI:
10.1016/j.cam.2019.112413
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发表时间:
2020-03
影响因子:
2.4
通讯作者:
Junyi Guo
Junyi Guo
中科院分区:
数学2区
文献类型:
--
作者:
Zhongyang Sun;Kam Chuen Yuen;Junyi Guo

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本文研究了具有两类相依保险业务的保险公司的最优再保险和投资策略,其中索赔数过程通过一个共同的冲击相关。假设保险公司也面临投资于一个金融市场的决策,其中一个无风险资产和一个风险资产遵循赫斯顿随机波动率(SV)模型。保险公司不得卖空风险资产。在均值-方差准则下,我们考虑了保险人最大化期望最终财富,同时最小化最终财富方差的问题。利用随机线性二次(LQ)最优控制和倒向随机微分方程(BSDES)的结果,我们推导出封闭形式的最优策略和有效边界的BSDES的解决方案。我们的方法表明如何BSDES可以用来解决均值方差问题在保险应用。最后,通过数值算例分析了有效边界的经济行为。
This paper studies the optimal reinsurance and investment strategy for an insurer with two dependent classes of insurance business, where the claim number processes are correlated through a common shock. It is assumed that the insurer also faces the decision making of investing in a financial market with one risk-free asset and one risky asset following the Heston stochastic volatility (SV) model. The insurer is not allowed to short sell the risky asset. Under the mean–variance criterion, we consider the insurer’s problem of maximizing the expected terminal wealth and, at the same time, minimizing the variance of the terminal wealth. Using the results of stochastic linear–quadratic (LQ) optimal control and backward stochastic differential equations (BSDEs), we derive closed-form expressions for the optimal strategies and the efficient frontiers in terms of solutions to the BSDEs. Our approach shows how BSDEs can be used to solve mean–variance problems in insurance applications. Finally, economic behavior of the efficient frontiers is analyzed by using some numerical examples.
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