The cost of capital (k) is a weighted average:
k = (weight)(cost of debt) + weight(cost of equity)
Debt/ Weight x + Weight x = Cost of
Assets Cost Cost Capital
of Debt of Equity
0% (.0)(.08) + (1.0)(.12) = .120
10 (.1)(.08) + (.9)(.12) = .116
20 (.2)(.08) + (.8)(.12) = .112
30 (.3)(.08) + (.7)(.13) = .115
40 (.4)(.09) + (.6)(.14) = .
120
50 (.5)(.10) + (.5)(.15) = .125
60 (.6)(.12) + (.4)(.16) = .136
b. The optimal capital structure is that combination, which minimizes the firms cost of capital. In this case that occurs where debt is 20% of capital and the cost of capital is 11.2%. The balance sheet is
Assets $100 Liabilities $20
Equity 80
Since the firm is currently using only 10% debt financing, it is not at its optimal capital structure and should substitute somewhat debt for equity.
c. The cost of capital initially declines because the effective cost of debt is slight than the cost of...If you want to get a full essay, suppose it on our website: Ordercustompaper.com
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