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arXiv 0906.0658q-fin.PR
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二阶渐近隐含波动率及其在SABR模型中的应用

Asymptotic Implied Volatility at the Second Order with Application to the SABR Model

Louis Paulot

摘要:

我们提供了一个通用的方法来计算泰勒展开的时间隐含波动率的随机波动率模型,使用热核展开。在已知的0阶隐含波动率之外,我们从热核展开的标量系数中精确地计算出所有冲击下的一阶修正。此外,在热核展开的第一次修正给出了隐含波动率的二阶修正,我们也给出了准确的所有罢工。作为一个应用,我们计算SABR模型在2阶的渐近展开。

英文摘要:

We provide a general method to compute a Taylor expansion in time of implied volatility for stochastic volatility models, using a heat kernel expansion. Beyond the order 0 implied volatility which is already known, we compute the first order correction exactly at all strikes from the scalar coefficient of the heat kernel expansion. Furthermore, the first correction in the heat kernel expansion gives the second order correction for implied volatility, which we also give exactly at all strikes. As an application, we compute this asymptotic expansion at order 2 for the SABR model.

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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