Question: The expected returns on Able Ltd, Blume Ltd and Cosmo Ltd can be explained fully by the Capital Asset Pricing Model. The standard deviation of
- The expected returns on Able Ltd, Blume Ltd and Cosmo Ltd can be explained fully by the Capital Asset Pricing Model. The standard deviation of returns on the market portfolio is 25%. The returns, standard deviation of returns and betas estimated for the companies are as follows:
| Company | Expected return | Standard deviation | Beta |
| Able Ltd | 24% | 31% | 1.2 |
| Blume Ltd | 14% | 42% | 0.5 |
| Cosmo Ltd | 18% | 35% | 0.78 |
Using this information determine the correlation coefficient between Cosmo Ltd and the Market Index. You will need to use the data above to, firstly, calculate the expected return on the market portfolio and the risk-free rate of interest.
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