In: Finance
. If you have $30,000 invested in each of two stocks and $20,000 invested in each of another three stocks and the betas on the stocks above are 0.8, 1.1, 1.0, 1.2 and 1.4, respectively, what is the beta of your portfolio, and what is the required return on the portfolio if the risk-free rate is 4.6% and the return on the market portfolio is 10.4%? What are the risk premiums for the market and for your portfolio?
Beta of portfolio is weighted average beta of each of the stocks | ||||||
Stock | Amount invested | Weights of stock | Beta | Weighted average | ||
1 | $30,000 | 25.00% | 30000/120000 | 0.80 | 0.20 | |
2 | $30,000 | 25.00% | 30000/120000 | 1.10 | 0.28 | |
3 | $20,000 | 16.67% | 20000/120000 | 1.00 | 0.17 | |
4 | $20,000 | 16.67% | 20000/120000 | 1.20 | 0.20 | |
5 | $20,000 | 16.67% | 20000/120000 | 1.40 | 0.23 | |
$120,000 | 1.075 | |||||
Thus, beta of the portfolio is 1.075 | ||||||
In order to calculate required return on the portfolio the required return for each stock will have to be calculated as required return on portfolio is weighted average stock return. | ||||||
Formula to calculate required return for each stock using CAPM model | ||||||
Required return = Risk free rate + Beta*(Market return - Risk free rate) | ||||||
Calculation of required return for each stock | Required return | Weights of stock | Weighted average | |||
Stock 1 | 0.046 + (0.80*(0.104-0.046)) | 9.24% | 25.00% | 2.31% | ||
Stock 2 | 0.046 + (1.10*(0.104-0.046)) | 10.98% | 25.00% | 2.75% | ||
Stock 3 | 0.046 + (1*(0.104-0.046)) | 10.40% | 16.67% | 1.73% | ||
Stock 4 | 0.046 + (1.20*(0.104-0.046)) | 11.56% | 16.67% | 1.93% | ||
Stock 5 | 0.046 + (1.40*(0.104-0.046)) | 12.72% | 16.67% | 2.12% | ||
10.84% | ||||||
Thus, the required return on portfolio is 10.84% | ||||||
Calculation of risk premium for market and portfolio | ||||||
Risk premium = Return of portfolio - Return of market | ||||||
Risk premium | 10.84-10.4 | |||||
Risk premium | 0.43% | |||||
Thus, risk premium for market and your portfolio is 0.43%. |