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20#
发表于 2012-4-2 18:28
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Matton, CFA, has been asked to invest $100,000, choosing one or more of the following three stocks. All stocks have the same expected return and standard deviation. The correlation matrix for the three stocks is given below: Stock Correlations | | X | Y | Z |
X | 1.00 | 0.15 | 0.70 |
Y | 0.15 | 1.00 | 0.51 |
Z | 0.70 | 0.51 | 1.00 |
Which of the three stocks, X, Y, and Z, should be included in the portfolio? | B)
| Any investment in the three stocks will result in the exact same expected return and risk. |
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Diversification benefits occur whenever a stock is added that is not perfectly positively correlated with other stocks in the portfolio. Since none of the stocks are perfectly positively correlated with the other stocks, it would be beneficial to purchase all three rather than just one or two stocks |
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