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估计日本股票在不同时段的波动率

文章 arXiv papers · 作者: Tetsuya Takaishi et al.

总结

本研究分别测量东京证券交易所上午和下午交易时段的已实现波动率。这样处理是为了避免在利用股票高频数据计算波动率时,非交易时段造成的偏差。研究比较了不同采样频率下的估计,并评估采样间隔变化时市场微观结构噪声对已实现波动率的偏差影响。

在调整该偏差后,作者用已实现波动率对收益率进行标准化。他们报告称,所得收益率近似服从高斯分布,同时波动率随时间变化;这一发现与分布混合假说一致。本文提供的是方法分析和统计结果,而非交易策略或盈利证据。此处没有说明样本时期、具体股票、精确采样频率或噪声影响的大小,因此仅凭此描述无法评估研究发现的适用范围和实际意义。

核心观点

  • 研究分别计算市场上午和下午交易时段的已实现波动率。
  • 研究考察采样频率如何影响已实现波动率估计中的微观结构噪声偏差。
  • 据报告,经过调整的波动率标准化后,收益率近似服从高斯分布。
  • 研究发现被描述为与时变波动率及分布混合假说一致。

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# Analysis of Realized Volatility in Two Trading Sessions of the Japanese Stock Market


# Analysis of Realized Volatility in Two Trading Sessions of the Japanese Stock Market









We analyze realized volatilities constructed using high-frequency stock data on the Tokyo Stock Exchange. In order to avoid non-trading hours issue in volatility calculations we define two realized volatilities calculated separately in the two trading sessions of the Tokyo Stock Exchange, i.e. morning and afternoon sessions. After calculating the realized volatilities at various sampling frequencies we evaluate the bias from the microstructure noise as a function of sampling frequency. Taking into account of the bias to realized volatility we examine returns standardized by realized volatilities and confirm that price returns on the Tokyo Stock Exchange are described approximately by Gaussian time series with time-varying volatility, i.e. consistent with a mixture of distributions hypothesis.

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。