Answer:
1.
Portfolio Beta = 1.225 rounded off to 1.23
Option e is the correct answer.
2.
r = 0.13338 or 13.338% rounded off to 13.34%
Explanation:
1.
The portfolio beta is a function of the weighted average of the individual stocks' betas that form up the portfolio. To calculate the beta of a portfolio, we use the following formula,
Portfolio Beta = wA * Beta of A + wB * Beta of B + ... + wN * Beta of N
Where,
w is the weight of each stock
Portfolio Beta = 0.21 * 0.66 + 0.34 * 1.21 + 0.45 * 1.5
Portfolio Beta = 1.225 rounded off to 1.23
2.
Using the CAPM, we can calculate the required rate of return on a stock. This is the minimum return required by the investors to invest in a stock based on its systematic risk, the market's risk premium and the risk free rate.
The formula for required rate of return under CAPM is,
r = rRF + Beta * (rM - rRF)
Where,
rRF is the risk free rate
rM is the market return
r = 0.037 + 1.22 * (0.116 - 0.037)
r = 0.13338 or 13.338% rounded off to 13.34%
