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- 2011-7-11
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- 2016-4-19
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Based on the explanation provided, the Sharpe of the stock being added is not equal to the Treynor of the stock since the stock exhibits unsystematic risk. The diversified portfolio, on the other hand, should not be affected by which ratio is used, for the reason you gave. But when the stock is added, unsystematic risk will be diversified away, so why use the Sharpe ratio when looking at the stock’s contribution to the portfolio? I think that’s why Treynor is best here. |
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