Answer:
The portfolio beta is 1.08
Step-by-step explanation:
The portfolio beta is the function of the weighted average of the individual stock betas that form up the portfolio. The weighatge is assigned to the stocks based on the investment in the stock as a proportion of the total investment in the portfolio. Thus, the portfolio beta is,
The investment in Con Edison = 45000 - 21200 - 10000 = $13800
Portfolio beta = 21200/45000 * 1.3 + 10000/45000 * 1 + 13800/45000 * 0.8
Portfolio beta = 1.08