Question: A portfolio manager summarizes the input from the macro and micro forecasters in the following table: Micro Forecasts Asset Expected Return (%) Beta Residual Standard
A portfolio manager summarizes the input from the macro and micro forecasters in the following table:
| Micro Forecasts | |||||||
| Asset | Expected Return (%) | Beta | Residual Standard Deviation (%) | ||||
| Stock A | 21 | 1.4 | 51 | ||||
| Stock B | 18 | 2.0 | 62 | ||||
| Stock C | 17 | 1.2 | 54 | ||||
| Stock D | 13 | 1.3 | 44 | ||||
| Macro Forecasts | ||||||
| Asset | Expected Return (%) | Standard Deviation (%) | ||||
| T-bills | 10 | 0 | ||||
| Passive equity portfolio | 15 | 24 | ||||
Compute the proportion in the optimal risky portfolio.
What is the Sharpe ratio for the optimal portfolio?
By how much did the position in the active portfolio improve the Sharpe ratio compared to a purely passive index strategy?
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