Growth Investing

Scope. This article describes what growth investors believe, what they look at, and what the evidence says about the assumption the approach depends on. It does not recommend the approach, rank it against value or any other, or supply a screen, threshold or criterion. No price, multiple or valuation of anything appears.

That is a claim about the arithmetic of valuation, and the arithmetic supports it. Where growth investing becomes contested is not the arithmetic but the second half of the position: that the companies which will grow durably can be identified in advance.

What practitioners look at

The rate and quality of revenue growth, and whether it comes from more customers, higher prices, or new products — three sources with very different durability.

The size of the opportunity remaining, since a company that has already served its market cannot grow into it again.

The reinvestment runway — whether capital put back into the business earns a return, and how much of it can be absorbed. Growth without a reinvestment opportunity produces cash rather than compounding, which is a different proposition entirely.

Unit economics, covered in Pillar 27, because aggregate losses during rapid customer acquisition are consistent with profitable units and with unprofitable ones, and the statements alone do not separate them.

Competitive position, since growth attracts entrants — the subject of the article on economic moats.

The arithmetic that makes the approach coherent

A faster-growing business has more of its value in the distant future. That is not rhetoric; it is computable. For a stream growing at a constant rate and discounted at the portal's canonical 9.0%, the share of present value lying beyond the first ten years rises steeply with the assumed growth rate.

Worked example — the approach's strength and its exposure are the same fact. At an assumed growth rate of 8% against a 9.0% discount rate, 91.2% of the present value sits beyond year ten — beyond any horizon over which a forecast is worth much. The strength: this is why growth investors argue that near-term earnings and current multiples are close to irrelevant, and on the arithmetic they are right. The exposure: it means the valuation is almost entirely an expression of belief about a period nobody has information on, and it is the same number in both readings. The sensitivity compounds the problem. Raising the assumed growth from 2% to 3% increases the value by 16.7%; from 5% to 6% by 33.3%; from 7% to 8% by 100.0%. And at 8% against a 9.0% discount rate, adding one more point makes the expression undefined — the model does not merely become sensitive, it breaks. That breakdown is not a flaw in growth investing; it is a warning about the tool. A constant-growth model assumes growth continues forever, and forever is where the arithmetic stops describing any company that has ever existed. (The multiples in the table are ratios of value to a first-year cash flow, not multiples of any price; the growing perpetuity is value = cash flow ÷ (rate − growth), and the share beyond year ten is ((1 + growth) ÷ (1 + rate))¹⁰.)

What the evidence says about the assumption underneath

The approach depends on high growth being both durable and identifiable in advance. That has been tested, and the results are not comfortable.

A study published in the Journal of Finance in 2003 examined long-term growth rates across a broad cross-section of companies over several decades. It reported that instances of sustained high growth do occur but are rare; that there is no persistence in long-term earnings growth beyond what chance would produce; and that predictability is low even using a wide range of predictor variables. It also found that published long-term growth forecasts were too optimistic and added little predictive power, and that valuation ratios had limited ability to predict future growth.

The counting result is the part worth carrying. In that sample, about 3% of surviving companies beat the median growth rate for five consecutive years, against roughly 3.1% expected by chance; over ten consecutive years the figure was 0.2% against about 0.1% expected. Sustained growth happens — and in that data it happened at close to the rate you would get from a coin.

Two things worth separating

Growth as a fact and growth as a category are different. Every business has a growth rate; "growth investing" describes an approach that treats the projected rate as the dominant input. A company can be growing quickly and be bought on value reasoning, or growing slowly and be bought on growth reasoning about a coming change. The labels describe the buyer's method rather than the company.

And growth in revenue is not growth in value. Revenue that requires proportionate capital to produce may add nothing, as the article on returns against the cost of capital sets out: growth compounds value only when the return on the incremental capital exceeds what that capital costs, and destroys value when it does not. Fast growth at an inadequate return is a machine for consuming capital efficiently.