According to the efficient markets hypothesis, the difference between today's price for a share of stock and tomorrow's price is

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The efficient markets hypothesis posits that all available information is already reflected in stock prices, making future price movements based on new information unpredictable or unforecastable. This means that it's not possible to consistently achieve higher returns on a risk-adjusted basis than the market overall by using information that the market already knows.

According to the Efficient Markets Hypothesis, the Difference Between Today's