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Forward Performance Processes under Multiple Default Risks

Author

Listed:
  • Wing Fung Chong
  • Roxana Dumitrescu
  • Gechun Liang
  • Kenneth Tsz Hin Ng

Abstract

This article constructs a forward exponential utility in a market with multiple defaultable risks. Using the Jacod-Pham decomposition for random fields, we first characterize forward performance processes in a defaultable market under the default-free filtration. We then construct a forward utility via a system of recursively defined, indexed infinite-horizon backward stochastic differential equations (BSDEs) with discounting, and establish the existence, uniqueness, and boundedness of their solutions. To verify the required (super)martingale property of the performance process, we develop a rigorous characterization of this property with respect to the general filtration in terms of a set of (in)equalities relative to the default-free filtration. We further extend the analysis to a stochastic factor model with ergodic dynamics. In this setting, we derive uniform bounds for the Markovian solutions of the infinite-horizon BSDEs, overcoming technical challenges arising from the special structure of the system of BSDEs in the defaultable setting. Passing to the ergodic limit, we identify the limiting BSDE and relate its constant to the risk-sensitive long-run growth rate of the optimal wealth process.

Suggested Citation

  • Wing Fung Chong & Roxana Dumitrescu & Gechun Liang & Kenneth Tsz Hin Ng, 2026. "Forward Performance Processes under Multiple Default Risks," Papers 2601.02276, arXiv.org.
    • Handle: RePEc:arx:papers:2601.02276
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    References listed on IDEAS

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