What is the competitive advantage period (CAP) and how is it used in valuation?

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AcadiFi · Accepted Answer

Competitive Advantage Period (CAP), sometimes called the value growth duration or fade period, is the number of years over which a firm sustains ROIC above WACC before competition erodes excess returns to zero.

For Alpine Technologies with current ROIC of 22% and WACC of 9% (13% spread), the CAP framework models ROIC fading linearly (or exponentially) toward 9% over a specified horizon. If CAP = 12 years, ROIC declines from 22% to 9% over that period. If CAP = 4 years, rapid competitive compression.

Estimating CAP: (1) Empirical studies show average US firm CAP of 5-10 years, but vary widely. (2) Durable moats (patents, network effects, switching costs) extend CAP to 15-25+ years. (3) Commodity-like businesses have CAP near zero — current ROIC ≈ WACC. (4) Industry studies provide sector-specific benchmarks.

Implementation in DCF: instead of a step-function from high-growth to terminal stage, CAP explicitly models ROIC fading year-by-year. FCFF in each year reflects declining reinvestment returns. This smooths terminal value sensitivity and forces explicit thinking about moat durability.

Alternatively, CAP can be used implicitly — if you believe Alpine's moat lasts 15 years, set terminal year 15 with ROIC = WACC, which mathematically means zero economic value-add from growth beyond year 15. Any g > 0 in terminal years requires ROIC > WACC, so enforcing ROIC = WACC in terminal makes g irrelevant for value (a tidy sanity check).

Market-implied CAP can also be calculated: given current market price, back-solve for CAP consistent with that valuation. Firms trading at high EV multiples often imply CAP of 15-20+ years — is that plausible?

What is the competitive advantage period (CAP) and how is it used in valuation?

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