Linear and Nonlinear Partial Integro-Differential Equations arising from Finance

Jose Cruz, Maria Grossinho, Daniel Sevcovic and Cyril Izuchukwu Udeani

Papers from arXiv.org

Abstract: The purpose of this review paper is to present our recent results on nonlinear and nonlocal mathematical models arising from modern financial mathematics. It is based on our four papers written jointly by J. Cruz, M. Grossinho, D. Sevcovic, and C. Udeani, as well as parts of PhD thesis by J. Cruz. We investigated linear and nonlinear partial integro-differential equations (PIDEs) arising from option pricing and portfolio selection problems and studied the systematic relationships between the PIDEs with option pricing theory and Black--Scholes models. First, we relax the liquid and complete market assumptions and extend the models that study the market's illiquidity to the case where the underlying asset price follows a L\'evy stochastic process with jumps. Then, we establish the corresponding PIDE for option pricing under suitable assumptions. The qualitative properties of solutions to nonlocal linear and nonlinear PIDE are presented using the theory of abstract semilinear parabolic equation in the scale of Bessel potential spaces. The existence and uniqueness of solutions to the PIDE for a general class of the so-called admissible L\'evy measures satisfying suitable growth conditions at infinity and origin are also established in the multidimensional space.

Date: 2022-07
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