Answer:
=2.98%
Step-by-step explanation:
Use CAPM to find the required return of the stock;
CAPM: r = risk free + beta(market return - risk free)
risk free = 4.5% or 0.045 as a decimal
beta = -0.4
market return = 8.3% or 0.083 as a decimal
Next, plug in the numbers into the CAPM formula;
r = 0.045 -0.4(0.083 - 0.045)
r = 0.045 -0.0152
r = 0.0298 or 2.98%
Therefore the required return is 2.98%