Long-term decomposition of robust pricing kernels under G-expectation

Jaehyun Kim and Hyungbin Park

Papers from arXiv.org

Abstract: This study develops a BSDE method for the long-term decomposition of pricing kernels under the G-expectation framework. We establish the existence, uniqueness, and regularity of solutions to three types of quadratic G-BSDEs: finite-horizon G-BSDEs, infinite-horizon G-BSDEs, and ergodic G-BSDEs. Moreover, we explore the Feynman--Kac formula associated with these three types of quadratic G-BSDEs. Using these results, a pricing kernel is uniquely decomposed into four components: an exponential discounting component, a transitory component, a symmetric G-martingale, and a decreasing component that captures the volatility uncertainty of the G-Brownian motion. Furthermore, these components are represented through a solution to a PDE. This study extends previous findings obtained under a single fixed probability framework to the G-expectation context.

Date: 2024-08
New Economics Papers: this item is included in nep-ipr
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