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Consistent investment of sophisticated rank‐dependent utility agents in continuous time

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  • Ying Hu
  • Hanqing Jin
  • Xun Yu Zhou

Abstract

We study portfolio selection in a complete continuous‐time market where the preference is dictated by the rank‐dependent utility. As such a model is inherently time inconsistent due to the underlying probability weighting, we study the investment behavior of a sophisticated consistent planners who seek (subgame perfect) intra‐personal equilibrium strategies. We provide sufficient conditions under which an equilibrium strategy is a replicating portfolio of a final wealth. We derive this final wealth profile explicitly, which turns out to be in the same form as in the classical Merton model with the market price of risk process properly scaled by a deterministic function in time. We present this scaling function explicitly through the solution to a highly nonlinear and singular ordinary differential equation, whose existence of solutions is established. Finally, we give a necessary and sufficient condition for the scaling function to be smaller than one corresponding to an effective reduction in risk premium due to probability weighting.

Suggested Citation

  • Ying Hu & Hanqing Jin & Xun Yu Zhou, 2021. "Consistent investment of sophisticated rank‐dependent utility agents in continuous time," Mathematical Finance, Wiley Blackwell, vol. 31(3), pages 1056-1095, July.
    • Handle: RePEc:bla:mathfi:v:31:y:2021:i:3:p:1056-1095
    DOI: 10.1111/mafi.12315
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    References listed on IDEAS

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    2. Christoph Frei & Liam Welsh, 2022. "How the Closure of a U.S. Tax Loophole May Affect Investor Portfolios," JRFM, MDPI, vol. 15(5), pages 1-10, May.
    3. Shuhui Liu, 2024. "The Maximal and Minimal Distributions of Wealth Processes in Black–Scholes Markets," Mathematics, MDPI, vol. 12(10), pages 1-18, May.
    4. Xue Dong He & Xun Yu Zhou, 2021. "Who Are I: Time Inconsistency and Intrapersonal Conflict and Reconciliation," Papers 2105.01829, arXiv.org.
    5. Zongxia Liang & Fengyi Yuan, 2021. "Equilibrium master equations for time-inconsistent problems with distribution dependent rewards," Papers 2112.14462, arXiv.org, revised Apr 2022.

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