Final answer:
The capital structure shift in here will not change the firm's cost of equity. The answer is 0% (option b).
Step-by-step explanation:
The cost of equity refers to the return required by shareholders in a company. It is calculated using the Capital Asset Pricing Model (CAPM), which takes into account the risk-free rate, the company's beta, and the market risk premium. In this case, the risk-free rate is 5.0% and the market risk premium is 6.0%.
Currently, the company's cost of equity (rl) can be calculated as follows:
rl = risk-free rate + beta * market risk premium
rl = 5.0% + 1.10 * 6.0% = 11.60%
If the company moves to a capital structure with 30% debt and 70% equity, the cost of equity will change. The cost of equity in this new capital structure (ru) can be calculated as follows:
ru = risk-free rate + beta * market risk premium
ru = 5.0% + 1.10 * 6.0% = 11.60%
Therefore, the capital structure shift will not change the firm's cost of equity. The difference between rl and ru is 0, which means the answer is 0% (option b).