Answer:
The answer is: True
Explanation:
Usually investors tend to be risk averse, reason why a higher risk must be matched by a higher return. If the returns of an investment are highly uncertain (their standard deviation is high), investors will require a higher rate of return. Uncertainty leads to higher risk, and higher risk leads to higher returns.
If we compare the rate of return of a stock A that has a standard deviation of 0.21, with the rate of return of a stock B that has a standard deviation of 0.10, we can conclude that:
Stock A has a higher investment risk than stock B, therefore investors will require a higher rate of return from stock A.
When stocks are part of a portfolio, diversification effects can lower their risk depending on what other stocks make up the portfolio.