Answer:
9.75%
4.2%
Explanation:
Given:
Stock index portfolio = 70% = 70/100 = 0.70
Risk free asset = 30% = 30/100 = 0.30
Return on the risk-free asset = 4.5% = 4.5/100 = 0.045
Return on the stock index = 12% = 12/100 = 0.12
Standard deviation (Return on the stock index) = 6% = 6/100 = 0.06
Computation of expected return on the portfolio:
Expected return = [Risk free asset × Return on the risk-free asset ] + [Stock index portfolio × Return on the stock index ]
= [0.3 × 4.5] + [0.7 × 12]
= [1.35 + 8.4]
= 9.75%
Computation of expected standard deviation of the portfolio:
Expected standard deviation = [Stock index portfolio × Standard deviation (Return on the stock index)]
= 0.7× 6
= 4.2%