On the rate of convergence of estimating the Hurst parameter of rough stochastic volatility models
粗糙随机波动率模型中 Hurst 参数估计的收敛速度AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接以积分方差观测估计粗糙随机波动率模型的 Hurst 参数,因此归入波动率方向。
粗糙随机波动率模型中 Hurst 参数估计的收敛速度AI 解读 ↓
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In [Han \& Schied, 2023, \textit{arXiv 2307.02582}], an easily computable scale-invariant estimator $\widehat{\mathscr{R}}^s_n$ was constructed to estimate the Hurst parameter of the drifted fractional Brownian motion $X$ from its antiderivative. This paper extends this convergence result by proving that $\widehat{\mathscr{R}}^s_n$ also consistently estimates the Hurst parameter when applied to the antiderivative of $g \circ X$ for a general nonlinear function $g$. We also establish an almost sure rate of convergence in this general setting. Our result applies, in particular, to the estimation of the Hurst parameter of a wide class of rough stochastic volatility models from discrete observations of the integrated variance, including the rough fractional stochastic volatility model.
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