Answer:
Explanation:
Given the following :
Portfolio - - - - - - Expected return - - - Std
Risk-free - - - - - - - - 6.0% - - - - - - - - - - 0%
Market - - - - - - - - - 10.2 - - - - - - - - - - - - 21
A - - - - - - - - - - - - - 8.2 - - - - - - - - - - - - 10
Calculate the sharpe ratios for the market portfolio and portfolio A.
Sharpe Ratio = (Expected portfolio return - Risk-free rate of return) / standard deviation of portfolio return
Sharpe ratio of market portfolio:
(10.2 - 6) / 21
4.2 / 21 = 0.20
Sharpe ratio of portfolio A:
(8.2 - 6) / 10
2.2 / 10 = 0.22
B) NO
If simple CAPM is valid, the above situation is Not possible, BECAUSE, according to the simple Capital Asset Pricing Model, the market portfolio is the most efficient, however with a Sharpe ratio of 0.20, which is lower than the sharpe ratio obtained for portfolio A, 0.22 then, portfolio A is more efficient.
