The Life Cycle of a Growth Company

"I never owned a bad stock by mistake — I owned stocks that were once good but had become bad. The challenge is knowing when the fertile field is exhausted." — T. Rowe Price Jr.

Most growth investors focus on when to buy. Price was equally focused on when to sell, because the greatest gains come from holding through the growth phase, while the greatest losses come from holding into the decline phase.

The three phases:

1. Growth phase — expand, accept higher multiples. Revenue growing faster than the economy, returns on capital high and sustained, and a large reinvestment opportunity relative to the current size. The stock will look expensive by historical standards — and, Price argued, it should.
2. Maturity phase — hold, watch for deceleration. Growth slows towards the rate of the economy, competition intensifies, and management starts returning capital rather than reinvesting. The business is still excellent, but the compounding rate is changing. Reduce gradually.
3. Decline phase — sell regardless of price. Growth falls below the economy, the core market is disrupted, and management turns to cost-cutting. The common mistake is holding because the stock looks "cheap on earnings" — but a declining business is never truly cheap, because the earnings themselves are what is shrinking.

Price's sell signals included: revenue growth decelerating for three consecutive years; research spending falling as a share of sales; new competitors taking share; and management shifting focus from growth to defending margins.

Illustrative example: a franchise that aged

A dominant imaging company was a classic growth stock for decades — strong brand, high returns, an expanding market. By the late 1980s the warning signs were flashing: slowing growth, falling research intensity, and a disruptive new technology emerging. The discipline called for selling; the common error was holding on because "the brand is still strong".