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随机波动率的渐近分析:Edgeworth展开

Asymptotic analysis for stochastic volatility: Edgeworth expansion

Masaaki Fukasawa

摘要:

在一般随机波动率模型下,利用遍历扩散的Edgeworth展开,证明了欧式期权价格近似公式的有效性.渐近展开式在Black-Scholes价格附近,并且在有界支付函数中是一致的。这一结果验证了已有的快速均值回复随机波动率模型的奇异摄动展开公式。

英文摘要:

The validity of an approximation formula for European option prices under a general stochastic volatility model is proved in the light of the Edgeworth expansion for ergodic diffusions. The asymptotic expansion is around the Black-Scholes price and is uniform in bounded payoff func- tions. The result provides a validation of an existing singular perturbation expansion formula for the fast mean reverting stochastic volatility model.

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