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The Daily Insight

How do you calculate the value of the firm in MM approach?

Author

James Craig

Published Feb 19, 2026

The expected return on equity of Firm A can be calculated based on the following formula: RE Firm A = RE Firm B + D/E *(RE Firm B – RD). Firm A is a levered firm and Firm B is an unlevered firm. Let’s assume a debt to equity ratio of 40:60.

What is the value of the levered firm?

The value of a levered firm equals the market value of its debt plus the market value of its equity.

What is Miller and Modigliani model?

What Is the Modigliani-Miller Theorem (M&M)? The Modigliani-Miller theorem (M&M) states that the market value of a company is correctly calculated as the present value of its future earnings and its underlying assets, and is independent of its capital structure.

What is MM Proposition I and II without taxes?

Proposition I without taxes shows the equality of value between a levered and unlevered firm under zero tax. MM Proposition II without taxes shows cost of equity of the levered firm as a function of cost of debt and equity of the unlevered firm.

What is MM approach to the problem of capital structure?

The Modigliani and Miller Approach further states that the market value of a firm is affected by its operating income, apart from the risk involved in the investment. The theory stated that the value of the firm is not dependent on the choice of capital structure or financing decisions of the firm.

Why does the MM theory with corporate taxes lead to 100% debt?

Why does the Modigliani and Miller theory with corporate taxes lead to 100% debt? Miller argued that because tax rates on capital gains have often been lower than tax rates owed on dividend and interest income, the firm might lower the total tax bill paid by the corporation and investor combined by not issuing debt.

How do you calculate the value of a merged firm?

Another method of determining the values of the firms under merger or consolidation is the earnings per share. According to this approach, the value of a prospective merger or acquisition is a function of the impact of merger/acquisition on the earnings per share.

What is the value of the tax shield if the value of the firm?

In this case, the value of tax shield is equal to the tax rate multiplied by financial expenses ( FE ). If the value of EBIT and other income (OI) is less than the amount of financial expenses , the company does not pay corporate income tax.