If stock returns follow a random walk pattern, then knowing the history of stock returns is not useful for predicting future stock returns.

Name: If stock returns follow a random walk pattern, then knowing the history of stock returns is not useful for predicting future stock returns.
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Quizplus · Accepted Answer

If stock returns follow a random walk pattern, then they exhibit no correlation or pattern over time. Therefore, the history of stock returns cannot be used to predict future returns since they are purely random.

If Stock Returns Follow a Random Walk Pattern, Then Knowing