Brief Summary of WACC and Its Components

Weighted Average Cost of Capital (WACC) Overview

  • WACC is the blended cost of a firm’s capital from various sources: common shares, preferred shares, and debt.

  • The formula for WACC: WACC=(E/V×Re)+((D/V×Rd)×(1−T))WACC = (E/V \times Re) + ((D/V \times Rd) \times (1 - T)) Where:

    • E = market value of equity

    • D = market value of debt

    • V = total value of capital

    • Re = cost of equity

    • Rd = cost of debt

    • T = tax rate

Components of WACC

  • Cost of Equity (Re) is calculated using the Capital Asset Pricing Model

    (CAPM): Re=Rf+β×(Rm−Rf)Re = Rf + \beta \times (Rm - Rf) Where:

    • Rf = risk-free rate

    • \beta = equity beta

    • Rm = expected market return

Cost of Equity Explained

  • Represents the return required by investors due to risk.

  • Beta measures stock volatility relative to the market.

  • Risk-free rate often derived from 10-year U.S. Treasury yield.

Estimating Equity Risk Premium and Beta

  • Equity Risk Premium (ERP) = Market Return - Risk-Free Rate.

  • Beta can be calculated using regression analysis or sourced from financial data services.

  • Unlevered Beta represents business risk excluding capital structure risk:
    Unlevered Beta=Levered Beta(1+(1−TaxRate)×(Debt/Equity))Unlevered \ Beta = \frac{Levered \ Beta}{(1 + (1 - Tax Rate) \times (Debt/Equity))}

Cost of Debt and Preferred Stock

  • Cost of Debt: yield to maturity on the firm's debt.

  • Cost of Preferred Stock: dividend yield on preferred shares.

  • After-tax cost of debt = cost of debt \times (1 - tax rate).

Limitations of WACC

  1. Difficult to measure: Inputs often based on judgment and comparables.

  2. Hard to apply to specific projects: Might differ from corporate-level WACC.

  3. Use of historical data: Assumes past trends will continue.

  4. Challenging for private companies: Requires comparables for estimating costs.