Complete the following sentence. If you graph returns on a portfolio against returns on the market and use regression to find the line of best fit, the slope of the line will be the portfolio's a. Beta b. Alpha c. Sharpe ratio d. Treynor ratio An investor is deciding whether to use a performance universe or a performance benchmark as a comparison in evaluating the performance of his portfolio. Which of the following ideal characteristics is true of performance universes? a. Specified in advance b. Measurable c. Investable d. Appropriate