arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.05307math.STstat.TH
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全局跳跃过滤器和已实现波动率

Global jump filters and realized volatility

Haruhiko Inatsugu, Nakahiro Yoshida

摘要:

对于带跳的半鞅,我们提出了一种新的综合波动率的估计方法,基于Inatsugu和Yoshida [8]提出的全局跳滤子,给出了连续鞅部分的二次变差。为了确定过程的每个增量是否具有跳转,全局跳转过滤器采用绝对增量的上$α$分位数作为阈值。这种跳跃过滤器被称为全局过滤器,因为它使用所有的观测值来分类一个增量。我们给出了一个收敛速率,并证明了全局已实现波动率及其变体“Winsorized全局波动率”的渐近混合正态性。通过模拟研究,我们表明,我们的估计优于以前的已实现波动率估计,使用一些相邻的增量,以减轻跳跃的影响。

英文摘要:

For a semimartingale with jumps, we propose a new estimation method for integrated volatility, i.e., the quadratic variation of the continuous martingale part, based on the global jump filter proposed by Inatsugu and Yoshida [8]. To decide whether each increment of the process has jumps, the global jump filter adopts the upper $α$-quantile of the absolute increments as the threshold. This jump filter is called global since it uses all the observations to classify one increment. We give a rate of convergence and prove asymptotic mixed normality of the global realized volatility and its variant "Winsorized global volatility". By simulation studies, we show that our estimators outperform previous realized volatility estimators that use a few adjacent increments to mitigate the effects of jumps.

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