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CFA Level I · CFA Level I Exam · Capital Structure

According to the static trade-off theory, the optimal capital structure is most likely reached at the debt level where:

The optimum occurs where the marginal tax benefit of additional debt equals the marginal expected cost of financial distress. Before that point extra debt adds value through interest tax shields; beyond it, distress costs outweigh the shield, so WACC is minimized at the balance point.

  1. Athe marginal tax benefit of debt equals the marginal expected cost of financial distressCorrect
  2. Bthe firm has no debt, to eliminate financial distress costs
  3. Cthe cost of equity equals the pre-tax cost of debt

Explanation

Static trade-off theory balances the tax shield benefit of interest against rising expected costs of financial distress. The optimum is where the marginal benefit equals the marginal cost, which minimizes WACC and maximizes value.

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