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Time-consistent mean-variance reinsurance-investment strategy for insurers under CEV model

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  • Xiang Lin
  • Yiping Qian

Abstract

We consider an optimal time-consistent reinsurance-investment strategy selection problem for an insurer whose surplus is governed by a compound Poisson risk model. In our model, the insurer transfers part of the risk due to insurance claims via a proportional reinsurance and invests the surplus in a simplified financial market consisting of a risk-free asset and a risky stock. The dynamics of the risky stock is governed by a constant elasticity of variance model to incorporate conditional heteroscedasticity as well as the feedback effect of an asset’s price on its volatility. The objective of the insurer is to choose an optimal time-consistent reinsurance-investment strategy so as to maximize the expected terminal surplus while minimizing the variance of the terminal surplus. We investigate the problem using the Hamilton-Jacobi-Bellman dynamic programming approach. Closed-form solutions for the optimal reinsurance-investment strategies and the corresponding value functions are obtained in both the compound Poisson risk model and its diffusion approximation. Numerical examples are also provided to illustrate how the optimal reinsurance-investment strategy changes when some model parameters vary.

Suggested Citation

  • Xiang Lin & Yiping Qian, 2016. "Time-consistent mean-variance reinsurance-investment strategy for insurers under CEV model," Scandinavian Actuarial Journal, Taylor & Francis Journals, vol. 2016(7), pages 646-671, August.
    • Handle: RePEc:taf:sactxx:v:2016:y:2016:i:7:p:646-671
    DOI: 10.1080/03461238.2015.1048710
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    Cited by:

    1. Ning Bin & Huainian Zhu & Chengke Zhang, 2023. "Stochastic Differential Games on Optimal Investment and Reinsurance Strategy with Delay Under the CEV Model," Methodology and Computing in Applied Probability, Springer, vol. 25(2), pages 1-27, June.

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