## Question

###### What is a good use of standard deviation when determining the risk of an investment in...

- What is a good use of standard deviation when determining the risk of an investment in common stock?

- Helps develop bands around an individual stock's expected value.
- Helps determine a portfolio's level of variability from the mean.
- Helps establish bands on the covariance between various stocks in the portfolio.
- Helps establish the amount of diversification that is needed in a portfolio.

## Answers

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