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arXiv 0812.3538q-fin.STmath.PRmath.STstat.TH
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瞬时波动率的估计

Estimation of the instantaneous volatility

A. Alvarez, F. Panloup, M. Pontier, N. Savy

摘要:

本文研究了随机波动率模型$dX_t=a_tdt+σ_tdW_t$中波动率过程的估计,其中$X$表示对数价格,$σ$是一个cadlàg半鞅.在最近的一系列工作的精神,估计的累积波动率,我们在这里专注于瞬时波动率,我们研究的估计量建立的有限差分的\textit{power variations}的日志价格。我们提供了中心极限定理与最佳速率取决于本地的行为$σ$。特别地,这些定理给出了$σ_t$的一些置信区间。

英文摘要:

This paper is concerned with the estimation of the volatility process in a stochastic volatility model of the following form: $dX_t=a_tdt+σ_tdW_t$, where $X$ denotes the log-price and $σ$ is a càdlàg semi-martingale. In the spirit of a series of recent works on the estimation of the cumulated volatility, we here focus on the instantaneous volatility for which we study estimators built as finite differences of the \textit{power variations} of the log-price. We provide central limit theorems with an optimal rate depending on the local behavior of $σ$. In particular, these theorems yield some confidence intervals for $σ_t$.

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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