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arXiv 2202.07378q-fin.MFq-fin.CP
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具有不确定波动率的Black Scholes模型计算——一种机器学习方法

Computing Black Scholes with Uncertain Volatility-A Machine Learning Approach

Kathrin Hellmuth, Christian Klingenberg

AI总结:

针对离散市场数据拟合Black Scholes模型的困难,提出用波动率为随机变量函数的Black Scholes方程建模,结合广义多项式混沌方法与Bi-Fidelity机器学习技术高效计算并量化衍生品定价中的不确定性。

摘要:

在金融数学中,用连续时间模型(如Black Scholes模型)来近似离散时间运行的金融市场是一种典型方法。由于市场数据的离散性,拟合该模型会带来困难。因此,我们用Black Scholes方程对金融衍生品的定价过程进行建模,其中波动率是有限个随机变量的函数。这反映了在确定波动率时不确定因素的影响。目的是在计算衍生品价格时量化这种不确定性的影响。我们的基本方法是广义多项式混沌(gPC)方法,通过随机Galerkin方法和有限差分法来数值计算解的不确定性。我们提出了该方法的一种高效数值变体,它基于一种机器学习技术,即所谓的Bi-Fidelity方法。并通过数值例子进行了说明。

英文摘要:

In financial mathematics, it is a typical approach to approximate financial markets operating in discrete time by continuous-time models such as the Black Scholes model. Fitting this model gives rise to difficulties due to the discrete nature of market data. We thus model the pricing process of financial derivatives by the Black Scholes equation, where the volatility is a function of a finite number of random variables. This reflects an influence of uncertain factors when determining volatility. The aim is to quantify the effect of this uncertainty when computing the price of derivatives. Our underlying method is the generalized Polynomial Chaos (gPC) method in order to numerically compute the uncertainty of the solution by the stochastic Galerkin approach and a finite difference method. We present an efficient numerical variation of this method, which is based on a machine learning technique, the so-called Bi-Fidelity approach. This is illustrated with numerical examples.

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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