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arXiv 2202.00877econ.EMq-fin.STstat.OT
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跳跃为无界变差的Lévy过程波动率的有效估计

Efficient Volatility Estimation for Lévy Processes with Jumps of Unbounded Variation

B. Cooper Boniece, José E. Figueroa-López, Yuchen Han

摘要:

基于高频观测的随机过程的统计推断是一个活跃的研究领域已经有十多年了。最著名和广泛研究的问题之一是估计连续分量的二次变差的伊藤半鞅跳跃。当跳变分量为有界变差时,已有文献提出了几种速率有效和方差有效的估计。然而,到目前为止,很少有方法可以处理跳跃的无界变化。通过发展Lévy过程截断矩的新的高阶展开式,构造了一类无界变差Lévy过程的新的速率和方差有效估计,其小跳的行为类似于Blumenthal-Getoor指标小于$8/5$的稳定Lévy过程的小跳.所提出的方法是基于一个两步去偏过程的截断实现的二次变差。我们的蒙特卡罗实验表明,该方法优于其他有效的替代品在文献中的设置覆盖我们的理论框架。

英文摘要:

Statistical inference for stochastic processes based on high-frequency observations has been an active research area for more than a decade. One of the most well-known and widely studied problems is that of estimation of the quadratic variation of the continuous component of an Itô semimartingale with jumps. Several rate- and variance-efficient estimators have been proposed in the literature when the jump component is of bounded variation. However, to date, very few methods can deal with jumps of unbounded variation. By developing new high-order expansions of the truncated moments of a Lévy process, we construct a new rate- and variance-efficient estimator for a class of Lévy processes of unbounded variation, whose small jumps behave like those of a stable Lévy process with Blumenthal-Getoor index less than $8/5$. The proposed method is based on a two-step debiasing procedure for the truncated realized quadratic variation of the process. Our Monte Carlo experiments indicate that the method outperforms other efficient alternatives in the literature in the setting covered by our theoretical framework.

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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