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A NUMERICAL METHOD FOR AMERICAN OPTION PRICING UNDER CEV

机译:CEV下美国期权定价的一种数值方法

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The Black-Scholes asset price dynamics is well known to be inadequate to capture the volatility smile in the financial market. Since then, the constant elasticity of variance (CEV) model has been a popular alternative to fit the smile.American option pricing under CEV is however computationally intensive as there is no analytical formulas available.This paper proposes an artificial boundary method for partial differential equations to compute American option prices and its Greeks under the CEV model. The idea is to reduce the infinite computational domain to a finite one by introducing an artificial boundary so that the optimal exercise boundary can efficiently be detected. Several numerical examples are given.
机译:众所周知,Black-Scholes资产价格的动态不足以捕捉金融市场的波动性微笑。从那时起,恒定弹性方差(CEV)模型就成为满足笑容的一种流行选择。然而,由于没有可用的解析公式,因此CEV下的美国期权定价需要大量计算。本文提出了一种偏微分方程的人工边界方法在CEV模型下计算美国期权价格及其希腊人。想法是通过引入人工边界将无限计算域减少到有限域,以便可以有效地检测最佳运动边界。给出了几个数值示例。

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