What remains of DCF?

What remains of DCF?

Nothing in the argument invalidates discounted cash flow. The finance framework becomes more important, not less, because it forces the narrative to specify where cash comes from and how long excess returns persist.

A simple steady-growth valuation can be written:

EV = FCF₁ / (WACC − g)

This formula is extremely sensitive when g approaches WACC. A terminal value that assumes durable growth and margins therefore embeds a strong claim about competitive persistence. For an AI business, the key question is not whether the technology grows. It is whether the provider's economic rent grows and persists.

A more useful decomposition is:

Revenue = addressable transaction volume × provider share × realized unit price

FCF = NOPAT − net investment

Enterprise value = PV(explicit unlevered FCF) + PV(terminal value)

Every term can be attacked by AI itself. Post-transformation market can shrink through cost compression. Share can fall through competitor formation. Price can fall through sufficient substitutes. NOPAT can fall through compute cost or competition, while required reinvestment can rise. The ROIC–WACC spread and its competitive-advantage period can contract as technological half-lives shorten.

Conversely, a provider that owns a durable bottleneck can survive all these attacks. DCF does not decide the question; it exposes which assumptions must be defended.

ROIC, WACC and the competitive-advantage period

The canonical bridge from scarcity to valuation is the spread between return on invested capital and the weighted average cost of capital:

ROICₜ = NOPATₜ / invested capitalₜ₋₁

Economic profitₜ = invested capitalₜ₋₁ × (ROICₜ − WACCₜ)

The competitive-advantage period (CAP) is the period over which ROIC remains above WACC. Competition need not eliminate revenue or accounting profit to destroy value creation; it need only push incremental ROIC toward WACC. Scarcity, appropriability and pricing power matter because they determine the initial spread and the rate at which it fades.

Operating value ≈ invested capital₀ + PV[economic profit during spread and fade]

For this thesis, scarcity migration is therefore a claim about the ROIC–WACC spread and its fade path. The relevant question is whether the provider continues to own each binding bottleneck long enough to preserve returns above its cost of capital.

Duration, discounting and terminal value in numbers

Suppose a provider produces $20 billion of annual excess free cash flow with no growth. Assign WACC—the discount rate for unlevered operating cash flow—a value of 10%. If the rent lasts for ten years, its present value is:

PV₁₀ = $20B × [1 − (1.10)⁻¹⁰] / 0.10 = $122.9B

If the same cash flow is assumed to continue forever, its present value is:

PV∞ = $20B / 0.10 = $200B

The $77.1 billion difference is not explained by next year's demand. It is the present value of cash flows after year ten. Treating the rent as perpetual therefore adds 62.8% to the finite-horizon value.

This sensitivity separates two claims that a multiple compresses: the required return and the duration of excess cash flow. A valuation can change materially even when current revenue, margins and technological utility are identical.