We introduce and solve a new type of quadratic backward stochastic differential equation systems defined in an infinite time horizon. Such systems arise naturally as candidate solutions to characterize forward performance processes and their associated optimal trading strategies in a regime switching market. We also study the asymptotic limit of the infinite horizon BSDE system, which gives arise to a novel ergodic BSDE system. In addition, we develop a connection between the solution of the ergodic BSDE system and the long-term growth rate of classical utility maximization problems.
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