MFIN1021 Chapter Notes - Chapter 13: Weighted Arithmetic Mean, Capital Structure

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Chapter 13
Formulas:
Weighted Average Cost of Capital = (Debt/Total x (1 - Tax Rate) rdebt) + (Equity/Total x requity),
Total = Debt + Equity
or
WACC = (Debt/Total x (1 - Tax Rate) rdebt) + (Preferred/Total x rpreferred) (Equity/Total x requity),
Total = Debt + Equity + Preferred
requity = DIV1/P0 + growth (based on the constant-growth formula)
rpreferred = Dividend/Price of Preferred
Definitions:
Capital Structure: the mix of long-term debt and equity financing
Weighted-Average Cost of Capital (WACC): the expected rate of return on a portfolio of all
the firm’s securities, adjusted for tax savings due to interest payments. The company cost of
capital is a weighted average of the returns demanded by debt and equity investors. The
weighted average is the expected rate of return investors would demand on a portfolio of all the
firm’s outstanding securities.
Rules:
Calculating WACC
1. Calculate the value of each security as a proportion of firm value
2. Determine the required rate of return on each security
3. Calculate a weighted average of the after-tax return on the debt and the return on equity
The weighted-average cost of capital is the rate of return that the firm must expect to
earn on its average-risk investments in order to provide an adequate expected return to
all its security holders. The weighted-average cost of capital is an appropriate discount
rate only for a project that is a carbon copy of the firm’s existing business. But often it is
used as a companywide benchmark discount rate; the benchmark may be adjusted
upward for unusually risky projects and downward for unusually safe ones.
When Corporate Tax Rate is Not Zero
â—Ź the weighted-average cost of capital is the right discount rate for average-risk
capital investments
â—Ź the weighted average cost of capital is the return the company needs to earn after
tax in order to satisfy all its security holders
â—Ź if the firm increases its debt ratio, both the debt and the equity will become more
risky. The debtholders and equityholders require a higher return to compensate
for increased risk
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Document Summary

Weighted average cost of capital = (debt/total x (1 - tax rate) rdebt) + (equity/total x requity), Wacc = (debt/total x (1 - tax rate) rdebt) + (preferred/total x rpreferred) (equity/total x requity), Total = debt + equity + preferred requity = div1/p0 + growth (based on the constant-growth formula) rpreferred = dividend/price of preferred. Capital structure: the mix of long-term debt and equity financing. Weighted-average cost of capital (wacc): the expected rate of return on a portfolio of all the firm"s securities, adjusted for tax savings due to interest payments. The company cost of capital is a weighted average of the returns demanded by debt and equity investors. The weighted average is the expected rate of return investors would demand on a portfolio of all the firm"s outstanding securities.

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