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arXiv 1011.4499math.PRq-fin.PM
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倒向随机微分方程的泛函方法及其在最优投资中的应用

A Functional Approach to FBSDEs and Its Application in Optimal Portfolios

G. Liang, T. Lyons, Z. Qian

摘要:

在Liang等人(2009)中,当前作者证明了BSDES可以重新表示为泛函微分方程,并且作为应用,他们在一般过滤概率空间上求解BSDES。在本文中,作者继续研究的功能微分方程,并演示如何使用这种方法来解决FBSDES。通过这种方法,方程可以在一个方向上求解,而不是在一个向前和向后的方式。然后利用该解通过非线性Girsanov变换构造了一类具有二次增长的时滞系统(不一定是标量系统)的弱解.由于求解过程是构造性的,不仅得到了解的存在唯一性定理,而且还真正地求出了这类二次增长的B-S系统的解。最后,基于泛函微分方程方法和非线性Girsanov变换,求解了不完全市场中的最优投资组合问题。

英文摘要:

In Liang et al (2009), the current authors demonstrated that BSDEs can be reformulated as functional differential equations, and as an application, they solved BSDEs on general filtered probability spaces. In this paper the authors continue the study of functional differential equations and demonstrate how such approach can be used to solve FBSDEs. By this approach the equations can be solved in one direction altogether rather than in a forward and backward way. The solutions of FBSDEs are then employed to construct the weak solutions to a class of BSDE systems (not necessarily scalar) with quadratic growth, by a nonlinear version of Girsanov's transformation. As the solving procedure is constructive, the authors not only obtain the existence and uniqueness theorem, but also really work out the solutions to such class of BSDE systems with quadratic growth. Finally an optimal portfolio problem in incomplete markets is solved based on the functional differential equation approach and the nonlinear Girsanov's transformation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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