For a long period, the modern financial theory based on efficient market hypothesis and random walk has been the mainstream of financial fields.

长期以来，以有效市场假说和随机游走为基础的现代金融理论一直占据着金融学术领域的主流地位。

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Random Walk Theory thinks that the price of the shares is unpredictable, and many concrete examples have already proved this conclusion.

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。

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Random Walk in Random Environments and the Operator Theory of M. C.

随机环境中的随机游动与M.C。的算子理论。

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Those who adhere to the random walk theory also point out that the timing of new data and news is unpredictable, and that stock prices react quickly to the introduction of new information.

FORBES: Are Stock Prices Random Or Chaotic?

Authors Guofo Zhou and Yingzi Zu use some complex math based on the random-walk theory to show that the odds of watching half your liquid net worth evaporate are roughly similar to those of another major life event: death.

FORBES: We Can't Avoid Another Market Crash