QUESTION 13 facilitate transactions on the New York Stock Exchange by taking positions in specific stocks: they also stand ready to buy o a. Floor brokers o b. Capstone members O c. Specialists O d. None of the above sell these stocks. QUESTION 14 When investors place a limit order, they can place it for the day only QUESTION 15 Which of the following is not commonly used as the estimate of a stock's volatility? o a the implied volatility derived from an option pricing model o b. the trend of historical standard deviations of returns over recent periods O c. the estimate of its option premium derived from an option pricing model o d. the estimate of its standard deviation of returns over a recent period