Now we can find the NPV of the project, which is:
NPV = Initial cost + PV of depreciation tax shield + PV of aftertax revenue
8. Whether the company issues stock or issues equity to finance the project is irrelevant. The
company’s optimal capital structure determines the WACC. In a world with corporate taxes, a firm’s
weighted average cost of capital equals:
Now we can use the weighted average cost of capital to discount NEC’s unlevered cash flows. Doing
so, we find the NPV of the project is:
9. a. The company has a capital structure with three parts: long-term debt, short-term debt, and
equity. Since interest payments on both long-term and short-term debt are tax-deductible,
multiply the pretax costs by (1 – tC) to determine the aftertax costs to be used in the weighted
average cost of capital calculation. The WACC using the book value weights is:
b. Using the market value weights, the company’s WACC is:
c. Using the target debt–equity ratio, the target debt–value ratio for the company is:
Substituting this in the debt–value ratio, we get:
And the equity–value ratio is one minus the debt–value ratio, or: