Maximum Principle of Stochastic Optimal Control Problems with Model Uncertainty

Tao Hao (), Jiaqiang Wen () and Jie Xiong ()
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Tao Hao: Shandong University of Finance and Economics
Jiaqiang Wen: Southern University of Science and Technology
Jie Xiong: Southern University of Science and Technology

Journal of Optimization Theory and Applications, 2025, vol. 207, issue 2, No 8, 41 pages

Abstract: Abstract This paper is concerned with the maximum principle of stochastic optimal control problems, where the coefficients of the state equation and the cost functional are uncertain, and the system is generally under Markovian regime switching. Firstly, the $$L^\beta $$ L β -solutions of forward-backward stochastic differential equations with regime switching are given. Secondly, we obtain the variational inequality by making use of the continuity of solutions to variational equations with respect to the uncertainty parameter $$\theta $$ θ . Thirdly, utilizing the linearization and weak convergence techniques, we prove the necessary stochastic maximum principle and provide sufficient conditions for the stochastic optimal control. Finally, as an application, a risk-minimizing portfolio selection problem is studied.

Keywords: Forward-backward stochastic differential equation; Maximum principle; Regime switching; Model uncertainty; Partial information; 93E20; 60H10; 60H30 (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s10957-025-02786-2

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