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Module 17: Discounted Cash Flow (DCF)

The Discounted Cash Flow (DCF) model is the most respected, rigorous tool in institutional finance. It strips away the hype and focuses on a profound truth: An asset is worth exactly the sum of the cash it will provide you in the future, adjusted for the risk of waiting for that cash.

1. Step 1: The Projection Period (Forecast)

Analysts cannot project year-by-year cash flows to infinity. Instead, they model a specific projection period (usually 5 to 10 years) where the firm holds a competitive advantage.

  • We project Unlevered Free Cash Flow (FCF), the cash generated by operations minus CapEx, before any debt obligations are paid.

2. Step 2: The Terminal Value (The "Forever" Value)

A corporation continues operating after Year 10. To capture the remaining value, analysts calculate the Terminal Value, which often makes up 60% to 80% of the entire DCF valuation.

  • Perpetuity Growth Method: Assumes the firm will grow its cash flows at a stable, conservative rate (usually tied to long-term US GDP growth, ~2-3%) forever.
  • Formula: Terminal Value = FCFn+1\ (WACC - g}

3. Step 3: Discounting to Present Value

Every future cash flow from the Projection Period, plus the massive Terminal Value, must be "discounted" back to today's dollars using the firm's WACC as the discount rate.

  • The sum of these present values equals the Enterprise Value of the firm.

Case Study: The Terminal Value Trap An analyst builds a DCF for a mature legacy automaker, aggressively assigning a 5% perpetual growth rate to the Terminal Value calculation.

  • Analysis: The Managing Director rejects the model. A mature firm cannot grow at 5% to infinity if long-term US GDP growth is only 2.5%; mathematically, the automaker would eventually outgrow the entire US economy. Terminal growth rates must reflect conservative, macroeconomic reality.

Self-Assessment Quiz

  1. Why does a DCF model rely on "Free Cash Flow" rather than accounting "Net Income"?
  2. Explain the purpose of the Terminal Value calculation in a 10-year DCF model.