Jensen’s alpha = return that was actually achieved – expected return
based on CAPM = 0.10 – [0.04 + 0.5 (0.07 – 0.04)] = 0.045 or 4.5%.
Portfolio Management MCQ - Portfolio Management Section 2
2
An investment manager has the following information regarding his portfolio’s return and volatility as compared to the market:
| Return | Risk | |
| Market | 9.50% | 17.50% |
| Portfolio | 15.50% | 23.20% |
Given that the risk free rate is 3.50%, M2 would be closest
Since George aims to maximize risk-adjusted returns, securities with a
higher Jensen’s alpha should have a greater weight in the portfolio.
M-squared and Sharpe ratio adjust for total risk, whereas Jensen’s alpha
adjusts for systematic risk.
Jensen’s alpha is based on systematic risk and does not require a
comparison. M-squared is based on total risk (not systematic risk). The
Treynor ratio is based on systematic risk but requires a comparison.

