Answer:
18%
Step-by-step explanation:
Data provided in the question:
Expected return for exposure to aluminum commodity prices = 10%
Risk-free rate = 4%
Beta of aluminum commodity prices = 0.5
Expected return for exposure to GDP changes = 12% = 0.12
Beta relative to GDP = 0.75
Now,
Expected return on this stock
= Risk-free rate + ∑(Beta × Return)
= 4% + ( 0.5 × 10% ) + ( 0.75 × 12% )
= 4% + 5% + 9%
= 18%