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arXiv 1002.0284q-fin.STphysics.soc-ph
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金融时间序列中的资产收益与波动率聚集

Asset returns and volatility clustering in financial time series

Jie-Jun Tseng, Sai-Ping Li

摘要:

对金融时间序列中的程式化事实进行了分析。我们发现,而不是在资产收益率分布的厚尾,在绝对收益率的自相关函数的缓慢衰减行为,实际上是直接相关的程度集群内的大波动的金融时间序列。我们还引入了一个指数来定量衡量这些时间序列中波动的聚集行为,并表明金融市场的大损失通常比大收益更严重。通过实例分析表明,与传统方法相比,该指数能够从金融时间序列中提取更多的信息。

英文摘要:

An analysis of the stylized facts in financial time series is carried out. We find that, instead of the heavy tails in asset return distributions, the slow decay behaviour in autocorrelation functions of absolute returns is actually directly related to the degree of clustering of large fluctuations within the financial time series. We also introduce an index to quantitatively measure the clustering behaviour of fluctuations in these time series and show that big losses in financial markets usually lump more severely than big gains. We further give examples to demonstrate that comparing to conventional methods, our index enables one to extract more information from the financial time series.

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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