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Optimal Asset Allocation for CRRA and CARA Insurers under the Vasicek Interest Rate Model

Author

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  • Hanlei Hu
  • Shaoyong Lai
  • Hongjing Chen
  • Sundarapandian Vaidyanathan

Abstract

This paper considers the reinsurance-investment problem with interest rate risks under constant relative risk aversion and constant absolute risk aversion preferences, respectively. Stochastic control theory and dynamic programming principle are applied to investigate the optimal proportional reinsurance-investment strategy for an insurer under the Vasicek stochastic interest rate model. Solving the corresponding Hamilton-Jacobi-Bellman equation via the Legendre transform approach, the optimal premium allocation strategies maximizing the expected utilities of terminal wealth are derived. In addition, several sensitivity analyses and numerical illustrations are given to analyze the impacts of different risk preferences and interest rate fluctuation on the optimal strategies. We find that the asset allocation and reinsurance ratio of the insurer are correlated with risk preference coefficient and interest rate fluctuation, and the insurance company may adjust the reinsurance-investment strategy to deal with interest rate risk.

Suggested Citation

  • Hanlei Hu & Shaoyong Lai & Hongjing Chen & Sundarapandian Vaidyanathan, 2022. "Optimal Asset Allocation for CRRA and CARA Insurers under the Vasicek Interest Rate Model," Discrete Dynamics in Nature and Society, Hindawi, vol. 2022, pages 1-14, January.
    • Handle: RePEc:hin:jnddns:3974488
    DOI: 10.1155/2022/3974488
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