Answer:
Higher-beta stock are expected to have higher required returns.
Why? → The broad equity market has a Beta of 1, beta coefficient of different stocks are measures with reference to the market beta.
If a beta coefficient is below 1, this means that the stock has a systematic risk which is lower that the market risk. When the beta coefficient is greater than 1 it means that the stock has an above-average risk and for that reason it has to have a greater return (since when you have more risk, you have to ask for more return in exchange of it)
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Beta coefficient is calculated by dividing the covariance of a stock´s return with market returns by variance of market return.
If beta is equal to 1, it means that the stock has a equal correlation with the market (its beta has to be less than 1 for the correlation to be negative)