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。

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

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本文首先分析了随机游走在有效市场理论中所扮演的重要角色。

This paper analyses the key role of random walk in the Efficient Market Hypothesis firstly.

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