Journal of the Operations Research Society of China ›› 2022, Vol. 10 ›› Issue (3): 559-577.doi: 10.1007/s40305-021-00386-1

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  • 收稿日期:2021-06-18 修回日期:2021-11-01 出版日期:2022-09-30 发布日期:2022-09-06

Time-Consistent Investment Strategies for a DC Pension Member with Stochastic Interest Rate and Stochastic Income

Li-Hua Bian1, Xing-Yi Li2, Zhong-Fei Li3   

  1. 1. School of Mathematics and Statistics, Xuzhou Institute of Technology, Xuzhou 221000, Jiangsu, China;
    2. School of Business, Sun Yat-sen University, Guangzhou 510275, Guangdong, China;
    3. Department of Finance, Southern University of Science and Technology, Shenzhen 518055, Guangdong, China
  • Received:2021-06-18 Revised:2021-11-01 Online:2022-09-30 Published:2022-09-06
  • Contact: Zhong-Fei Li,Li-Hua Bian,Xing-Yi Li E-mail:lnslzf@mail.sysu.edu.cn;bianlh1028@163.com;lixy399@mail2.sysu.edu.cn
  • Supported by:
    This paper is supported by the National Natural Science Foundation of China (Nos.71991474,71721001 and 72001219).

Abstract: This paper studies two multi-period mean-variance investment problems for a DC pension member before and after retirement.At any time,the pension manager can invest in a risk-free asset and multi-risky assets.Before retirement,the manager tries to optimize the mean-variance utility of the wealth in the member's pension account at retirement.At retirement,the pension account wealth (or part of it) is used to purchase a paid-up annuity.After retirement,the manager has to pay the guaranteed annuity,continues to invest,and aims to optimize the mean-variance utility of the terminal wealth at a fix future time,to satisfy the pension member's heritage and life needs in the next stage.Interest rate risk and income risk are introduced.Applying the game theory and the extended Bellman equation,the time-consistent investment strategies and the efficient frontiers before and after retirement are obtained explicitly.Obtained results indicate that the stochastic interest rate and the stochastic income have essential effects on the investment strategies.

Key words: DC pension fund, Time-consistent strategy, Stochastic income, Stochastic interest rate, Multi-period mean-variance model

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