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Optimal Consumption–Investment with Constraints in a Regime Switching Market with Random Coefficients
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Optimal Consumption–Investment with Constraints in a Regime Switching Market with Random Coefficients
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Journal Article
Optimal Consumption–Investment with Constraints in a Regime Switching Market with Random Coefficients
2025
Overview
This paper studies finite-time optimal consumption–investment problems with power, logarithmic and exponential utilities, in a regime switching market with random coefficients and possibly subject to non-convex constraints. Compared to the existing models, one distinguish feature of our model is that the trading constraints put on the consumption and investment strategies are coupled together in the cases of power and logarithmic utilities, leading to new technical challenges. We provide explicit optimal consumption–investment strategies and optimal values for these consumption–investment problems, which are expressed in terms of the solutions to some multi-dimensional diagonally quadratic backward stochastic differential equation (BSDE) and linear BSDE with unbound coefficients. These BSDEs are new in the literature and solving them is one of the main theoretical contributions of this paper. We accomplish the latter by applying the truncation, approximation technique to get some a priori uniformly lower and upper bounds for their solutions.
Publisher
Springer US,Springer Nature B.V,Springer Verlag (Germany)
