Answer: Expected Return = 12%
Step-by-step explanation:
Yield on short-term government securities = 4%
The expected return required by the market for a portfolio with a beta of 1 = 12%
Now, according to the capital asset pricing model:
Expected Return = Risk-free rate + Beta × (expected return on the market - risk-free rate)
= 4 + 1 (12 - 4)
= 12%
∴ The expected return on the market portfolio is 12%.