If security prices follow a random walk,then on any particular day the odds are that an increase or decrease in price is about equally likely.

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Quizplus · Accepted Answer

If security prices follow a random walk, it means that each change in price is completely independent of the previous change, and therefore the odds of an increase or decrease are about equally likely on any particular day. This is the definition of a random walk.

If Security Prices Follow a Random Walk,then on Any Particular