Principles of Corporate Finance
Principles of Corporate Finance
13th Edition
ISBN: 9781260465099
Author: BREALEY, Richard
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 17, Problem 22PS

After-tax WACC Gamma Airlines has an asset beta of L.5. The risk-free interest rate is 6%, and the market risk premium is 8%. Assume the capital asset pricing model is correct. Gamma pays taxes at a marginal rate of 25%. Draw a graph plotting Gamma's cost of equity and after-tax WACC as a function of its debt-to-equity ratio DIE, from no debt to DIE= 1.0. Assume that Gamma’s debt is risk-free up to DIE= .25. Then the interest rate increases to 6.5% at DIE= .5, 7% at DIE= .8, and 8% at DIE= 1.0. As in Problem 21, you can assume that the firm's overall beta (βA) is not affected by its capital structure or the taxes saved because debt interest is tax-deductible.

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Scenario one: Under what circumstances would it be appropriate for a firm to use different cost of capital for its different operating divisions? If the overall firm WACC was used as the hurdle rate for all divisions, would the riskier division or the more conservative divisions tend to get most of the investment projects? Why? If you were to try to estimate the appropriate cost of capital for different divisions, what problems might you encounter? What are two techniques you could use to develop a rough estimate for each division’s cost of capital?
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