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基于时段的已实现波动率与日经收益动态

文章 arXiv papers · 作者: Tetsuya Takaishi et al.

总结

本研究计算日经225的已实现波动率,并考察经波动率标准化的收益是否接近正态分布。为处理隔夜非交易时段的影响,研究分别估计东京证券交易所上午和下午时段的波动率。研究还报告称,在较短采样间隔下,市场微观结构噪声会降低测得的已实现波动率。

分析将已实现波动率作为积分波动率的代理指标,对每个交易时段的收益进行标准化,并检验其方差、峰度和六阶矩。报告称,这些统计量与标准正态分布一致,支持将日经收益描述为波动率随时间变化的高斯过程。证据仅限于所报告的分布矩和所研究的指数;这并不能证明收益在所有方面或所有市场环境下都服从正态分布。

核心观点

  • 为处理非交易时段的影响,研究分别计算上午和下午时段的已实现波动率。
  • 在较短采样间隔下,微观结构噪声会降低已实现波动率估计值。
  • 研究使用已实现波动率作为积分波动率的代理指标来标准化收益。
  • 报告称,标准化收益的方差、峰度和六阶矩与正态性一致。
  • 在分析范围内,研究结果支持将所研究指数建模为波动率时变的高斯过程。

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# Analysis of Realized Volatility for Nikkei Stock Average on the Tokyo Stock Exchange


# Analysis of Realized Volatility for Nikkei Stock Average on the Tokyo Stock Exchange









We calculate realized volatility of the Nikkei Stock Average (Nikkei225) Index on the Tokyo Stock Exchange and investigate the return dynamics. To avoid the bias on the realized volatility from the non-trading hours issue we calculate realized volatility separately in the two trading sessions, i.e. morning and afternoon, of the Tokyo Stock Exchange and find that the microstructure noise decreases the realized volatility at small sampling frequency. Using realized volatility as a proxy of the integrated volatility we standardize returns in the morning and afternoon sessions and investigate the normality of the standardized returns by calculating variance, kurtosis and 6th moment. We find that variance, kurtosis and 6th moment are consistent with those of the standard normal distribution, which indicates that the return dynamics of the Nikkei Stock Average are well described by a Gaussian random process with time-varying volatility.

在遵守原作品许可的前提下,附作者信息全文展示。 许可协议: abstract CC0

此摘要由 Stratmill 研究智能体根据原文撰写,并非原文副本。