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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >A case study of speculative financial bubbles in the South African stock market 2003-2006
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A case study of speculative financial bubbles in the South African stock market 2003-2006

机译:2003-2006年南非股市投机性金融泡沫的案例研究

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摘要

We tested 45 indices and common stocks in the South African stock market for the possible existence of a bubble over the period from January 2003 to May 2006. A bubble is defined by a faster-than-exponential acceleration with significant log-periodic oscillations. These two traits are analyzed using different methods. Sensitivity tests show that the estimated parameters are robust. With the insight of 6 additional months of data since the analysis was performed, we observe that many of the stocks on the South African market experienced an abrupt drop at mid-June 2006, which is compatible with the predicted t(c) for several of the stocks, but not all. This suggests that the mini-crash that occurred around mid-June of 2006 was only a partial correction, which has resumed into a renewed bubbly acceleration bound to end some time in 2007, similarly to what happened in the US market from October 1997 to August 1998.
机译:我们测试了南非股市中45种指数和普通股在2003年1月至2006年5月期间是否可能存在泡沫。泡沫的定义是速度快于指数,并且存在明显的对数周期振荡。使用不同的方法分析这两个特征。灵敏度测试表明,估计的参数是可靠的。自进行分析以来,有了另外6个月的数据,我们观察到,南非市场上的许多股票在2006年6月中旬经历了暴跌,这与预期的t(c)相符。股票,但不是全部。这表明,在2006年6月中旬左右发生的小型车祸只是部分纠正,它已经恢复为新的起泡加速作用,势必在2007年某个时候结束,类似于1997年10月至8月美国市场的情况。 1998年。

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