Final answer:
The difference between Company A's and Company B's required rates of return can be calculated using the Capital Asset Pricing Model (CAPM).
Step-by-step explanation:
The difference between Company A's and Company B's required rates of return can be calculated using the Capital Asset Pricing Model (CAPM). The CAPM formula is:
R(a) = R(f) + beta * (R(m) - R(f))
Where:
R(a) is the required rate of return,
R(f) is the risk-free rate,
beta is the measure of a stock's risk relative to the overall market,
R(m) is the return on the stock market.
For Company A,
R(a) = 4.25% + 0.70 * (11.00% - 4.25%) = 4.25% + 0.70 * 6.75%
R(a) = 4.25% + 4.725%
R(a) = 8.975%
For Company B,
R(a) = 4.25% + 1.20 * (11.00% - 4.25%) = 4.25% + 1.20 * 6.75%
R(a) = 4.25% + 8.10%
R(a) = 12.35%
The difference between A's and B's required rates of return is 12.35% - 8.975% = 3.375%, which is approximately 3.38% (option D).