但是，近年来均值回归理论对随机漫步理论提出了挑战。
But, in recent years, Average Value Return Theory gave a challenge to the Random Walk Theory.
随机漫步理论认为股票的价格是不能预测的，许多实证检验的结果也支持了这一结论。
Random Walk Theory thinks that the price of the shares is unpredictable, and many concrete examples have already proved this conclusion.
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