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arXiv physics/0702106physics.soc-phq-fin.ST
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金融收益率的时间不变相关结构的出现--基于市场模型的减法

Emergence of time-horizon invariant correlation structure in financial returns by subtraction of the market mode

Christian Borghesi, Matteo Marsili, Salvatore Miccichè

摘要:

我们研究了资产收益相关矩阵中的一个结构的出现,因为计算收益的时间范围从分钟增加到每日规模。我们分析来自不同股票市场(纽约,巴黎,伦敦,米兰)的数据,并使用不同的方法。结果关键取决于数据是否仅限于市场的“内部”动态,即“质心”运动(市场模式)是否被去除。如果市场模式没有被删除,我们发现,结构出现,随着时间跨度的增加,从分裂一个单一的大集群。在纽约证券交易所,我们发现,当市场模式被删除,在每日规模的相关性结构已经很好地定义在5分钟的时间跨度,这一结构占80%的股票分类的经济部门。其他市场也有类似的结果,尽管没有那么明显。我们还发现,在隔夜收益率的相关性结构是显着不同的日内活动。

英文摘要:

We investigate the emergence of a structure in the correlation matrix of assets' returns as the time-horizon over which returns are computed increases from the minutes to the daily scale. We analyze data from different stock markets (New York, Paris, London, Milano) and with different methods. Result crucially depends on whether the data is restricted to the ``internal'' dynamics of the market, where the ``center of mass'' motion (the market mode) is removed or not. If the market mode is not removed, we find that the structure emerges, as the time-horizon increases, from splitting a single large cluster. In NYSE we find that when the market mode is removed, the structure of correlation at the daily scale is already well defined at the 5 minutes time-horizon, and this structure accounts for 80 % of the classification of stocks in economic sectors. Similar results, though less sharp, are found for the other markets. We also find that the structure of correlations in the overnight returns is markedly different from that of intraday activity.

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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