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Chinese Journal of Management Science ›› 2019, Vol. 27 ›› Issue (1): 34-43.doi: 10.16381/j.cnki.issn1003-207x.2019.01.004

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Multi-period Portfolio Game Model Based on Relative Wealth Utility

ZHOU Zhong-bao1, REN Tian-tian1, XIAO He-lu2, WU Shi-jian3, LIU Wen-bin4   

  1. 1. School of Business Administration, Hunan University, Changsha 410082, China;
    2. Business School, Hunan Normal University, Changsha 410081, China;
    3. College of Economics and Management, Shandong University of Science and Technology, Qingdao 266510, China;
    4. Business School, University of Kent, Kent CT2 7PE, England
  • Received:2017-05-26 Revised:2018-01-03 Online:2019-01-20 Published:2019-03-25

Abstract: Most existing portfolio optimization models assume that investors are independent. However, the investors especially institutional investors, usually affect each other in actual investment. Based on the portfolio optimization and Nash game theories, the competition relationship is considered into investors' decision-making, and a multi-period portfolio game model is constructed by maximizing the expected utility of the relative terminal wealth of each competitor. The close forms of the Nash equilibrium investment strategy and the corresponding value function are obtained. By using the empirical cumulative distribution function and the certainty equivalent, the Nash equilibrium investment strategy is compared with the traditional strategy in our simulations. The results show that the Nash equilibrium strategy is more effective for investors.

Key words: multi-period portfolio optimization, game model, Nash equilibrium, relative wealth utility

CLC Number: