Question 9 Which of the following is NOT used to measure a stock's risk? a. the stock's return b. the value-at-risk method c. the stock's price volatility d. All of these are used to measure risk. e. the stock's beta Question 10 The beta of a stock portfolio is equal to a weighted average of the a. betas of stocks in the portfolio, plus their correlation coefficients. b. correlation coefficients between stocks in the portfolio. c. betas of stocks in the portfolio. d. standard deviations of stocks in the portfolio