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The expected return of an investor's portfolio is 31% with a standard deviation of 19% while the expected return of the market is 22% with a standard deviation of 16%. Given that the risk-free rate is 5% and the portfolio's beta is 0.9, determine the difference between the Sharpe ratio of the portfolio and the Sharpe ratio of the market.
Explanation:
Sharpe Ratio = (Expected Return - Risk-Free Rate) / Standard Deviation
Difference = Sharpe Ratio (Portfolio) - Sharpe Ratio (Market) = 1.37 - 1.06 = 0.31
Note: The portfolio's beta of 0.9 is not needed for Sharpe ratio calculations, as Sharpe ratio uses total risk (standard deviation) rather than systematic risk (beta).