Capital structure in a perfect market - Modigliani-Miller II: leverage, risk and the cost of capital

4 important questions on Capital structure in a perfect market - Modigliani-Miller II: leverage, risk and the cost of capital

With perfect capital markets, as a firm increases its leverage, how does its debt cost of capital change? Its equity cost of capital? Its weighted average cost of capital?

With perfect capital markets, as a firm increases its leverage, its debt and equity costs of capital both increase, but its weighted average cost of capital remains constant because more weight is put on the lower cost debt.

Which equation shows that the levered equity return equals the unlevered return, plus an additional effect due to leverage.

RE = RU + (D/E) * (RU - RD)

How do you compute the unlevered beta?

BU = [E/(E+D)] * BE + [D/(E+D)] * BD
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How do you compute the net debt of a firm?

Debt - cash and risk free securities.

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