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arXiv 2303.10550q-fin.ST
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基于快速多变点检测的高频波动率估计

High-Frequency Volatility Estimation with Fast Multiple Change Points Detection

Greeshma Balabhadra, El Mehdi Ainasse, Pawel Polak

AI总结:

本文提出基于 $\ell_1$ 正则化和快速多变点检测的稀疏高频波动率估计方法,兼具计算效率与样本末端断点识别能力,并在样本外波动率预测中优于多种经典及近期估计量。

摘要:

我们提出了一种构造稀疏高频波动率估计量的方法,该方法对现货波动率过程中的变点具有稳健性。我们提出的估计量是现有波动率估计量的 $\ell_1$ 正则化版本。我们重点关注幂变差估计量,因为它们代表了一类基本的波动率估计量。我们建立了这些估计量对真实未观测波动率和变点位置的一致性,并证明了对于特定的波动率估计量可以达到极小极大速率。新估计量利用计算高效的最小角回归算法进行估计,随后采用简化的动态规划步骤来精化最终的变点数量。在数值性能方面,这些估计量不仅计算速度快,而且能够准确识别样本末端附近的断点,这两个特征在当今电子交易环境中都非常理想。在样本外波动率预测方面,我们的新估计量提供了更真实、更平滑的波动率预测,在各种频率和预测区间上均优于广泛的经典和近期波动率估计量。

英文摘要:

We propose a method for constructing sparse high-frequency volatility estimators that are robust against change points in the spot volatility process. The estimators we propose are $\ell_1$-regularized versions of existing volatility estimators. We focus on power variation estimators as they represent a fundamental class of volatility estimators. We establish consistency of these estimators for the true unobserved volatility and the change points locations, showing that minimax rates can be achieved for particular volatility estimators. The new estimators utilize the computationally efficient least angle regression algorithm for estimation purposes, followed by a reduced dynamic programming step to refine the final number of change points. In terms of numerical performance, these estimators are not only computationally fast but also accurately identify breakpoints near the end of the sample, both features highly desirable in today's electronic trading environment. In terms of out-of-sample volatility prediction, our new estimators provide more realistic and smoother volatility forecasts, outperforming a broad range of classical and recent volatility estimators across various frequencies and forecasting horizons.

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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