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arXiv 1306.2508q-fin.STq-fin.PM
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标准普尔股票市场的阶段转换

Phase Transition in the S&P Stock Market

Matthias Raddant, Friedrich Wagner

摘要:

我们分析了1987年至2012年标准普尔市场的股票价格,并在几年的时间窗口内确定了公司收益率的协方差矩阵。属于领先的本征值(市场)的本征向量表现出在其长期的时间依赖性的相变与序参数,可以解释在一个基于代理的模型。从1995年到2005年,市场处于有序状态,2005年以后,市场处于无序状态。

英文摘要:

We analyze the stock prices of the S&P market from 1987 until 2012 with the covariance matrix of the firm returns determined in time windows of several years. The eigenvector belonging to the leading eigenvalue (market) exhibits in its long term time dependence a phase transition with an order parameter which can be interpreted within an agent-based model. From 1995 to 2005 the market is in an ordered state and after 2005 in a disordered state.

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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