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arXiv 2102.13467q-fin.STecon.EMstat.ME
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隔夜GARCH -伊藤波动率模型

Overnight GARCH-Itô Volatility Models

Donggyu Kim, Minseok Shin, Yazhen Wang

摘要:

金融数据的各种参数波动率模型已被开发出来,以纳入高频已实现波动率并更好地捕捉市场动态。然而,由于高频交易数据在收盘至开盘期间不可用,因此波动率模型常常忽略收盘至开盘期间的波动率信息,从而可能损失与市场动态相关的重要信息。在本文中,考虑到全天的市场动态,我们提出了一个隔夜波动率模型的基础上伊藤扩散,以适应两个不同的瞬时波动过程的开放到关闭和关闭到开放期间。我们发展了一种加权最小二乘方法来估计两个不同时期的模型参数,并研究了它的渐近性质。我们进行了模拟研究,以检查所提出的模型和方法的有限样本性能。最后,我们将所提出的方法应用于真实的交易数据。

英文摘要:

Various parametric volatility models for financial data have been developed to incorporate high-frequency realized volatilities and better capture market dynamics. However, because high-frequency trading data are not available during the close-to-open period, the volatility models often ignore volatility information over the close-to-open period and thus may suffer from loss of important information relevant to market dynamics. In this paper, to account for whole-day market dynamics, we propose an overnight volatility model based on Itô diffusions to accommodate two different instantaneous volatility processes for the open-to-close and close-to-open periods. We develop a weighted least squares method to estimate model parameters for two different periods and investigate its asymptotic properties. We conduct a simulation study to check the finite sample performance of the proposed model and method. Finally, we apply the proposed approaches to real trading data.

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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