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Stability Analysis of Heston Characteristic Function with Optimal Volatility Parameters

机译:具有最优波动率参数的Heston特征函数的稳定性分析

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Heston volatility model has received a growing attention amongst academics and practitioners for derivative pricing applications. Yet, the sensibility of the model parameters and instabilities of its analytic characteristic function for large derivatives and complex derivations make the model inconsistent and unreliable. As these parameters and function are defined and used in the complex plane, they potentially include ‘branching’. Therefore, additional parameter restrictions are required. This paper aims at providing insight on the sensitivity of the model parameterization and establishing an algorithm to ensure the stability of the analytic characteristic function under full dimensional and unrestricted parameter space.
机译:Heston波动率模型已在学者和从业者中越来越受到衍生定价应用的关注。然而,对于大导数和复杂导数,模型参数的敏感性及其分析特征函数的不稳定性使模型变得不一致且不可靠。由于这些参数和功能是在复杂平面中定义和使用的,因此可能包含“分支”。因此,需要其他参数限制。本文旨在深入了解模型参数化的敏感性,并建立一种算法来确保解析特征函数在全维和无限制参数空间下的稳定性。

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