Growth Investing
Buying companies whose earnings are expanding quickly, on the view that the growth will justify a price that already looks high.
Overview
Growth investing accepts a high price today in exchange for earnings that are expanding fast enough to make it reasonable later. The central skill is not finding growth, which is visible to everyone, but judging how much of it the price already assumes.
How the philosophy developed
Thomas Rowe Price Jr. established growth investing as a formal discipline in the middle of the twentieth century, arguing that owning well run companies through long expansions could compound wealth in a way that trading cheap securities could not.
Philip Fisher gave the approach its research method, insisting that management quality and research culture were the things that determined whether growth persisted, and that these could be investigated directly rather than inferred from the accounts.
Peter Lynch brought it to a general audience at Fidelity from 1977, popularising the practice of comparing a company's price-to-earnings ratio against its growth rate so that a fast grower and a slow one could be judged on the same terms. More recently the approach has extended into thematic innovation investing, where the growth being paid for is years away.
Core principles
- Over long periods a share price tends to follow earnings, so the direction and durability of earnings growth is the thing to establish.
- A high multiple is not by itself expensive, and a low one is not by itself cheap, because both are statements about expectations rather than about value.
- The useful question is not whether a company will grow but whether it will grow more than the price already assumes.
- A small number of very large winners produce most of the return, so the cost of being wrong on many positions is acceptable if the winners are held.
How decisions get made
Practitioners look for evidence that growth is real and repeatable rather than a single good year: expanding unit volumes, an addressable market that is not yet saturated, and a business model that works as it gets larger.
They then test the price against the growth. Lynch popularised dividing the price-to-earnings ratio by the earnings growth rate as a rough single measure, which allows a slow company on a low multiple and a fast one on a high multiple to be compared directly.
Selling is the hardest part of the discipline and the least systematic. Because the thesis is about future earnings rather than a present discount, there is no natural exit signal, and practitioners tend to sell when growth decelerates rather than when a price target is reached.
How it approaches valuation
Valuation leans on forecast earnings rather than current assets, which means most of the estimated value sits several years out. Some practitioners use a discounted cash flow, others use a multiple applied to a forecast year, and both are highly sensitive to the growth assumption.
Where a company has no earnings yet, valuation shifts to the size of the market it might serve and the share it might take. Cathie Wood's use of cost curves and adoption rates is the most explicit modern version, and it is also where the approach draws its heaviest criticism.
How it approaches risk
The dominant risk is paying for growth that does not arrive, which is punished twice over: earnings come in below forecast and the multiple the market is willing to pay contracts at the same time.
Practitioners generally accept much larger price swings than value investors, on the reasoning that the outcome depends on a few holdings compounding over years and that interim volatility is the cost of that. Whether an individual can actually tolerate those swings is a separate question from whether the strategy is sound.
How portfolios are built
Approaches vary more here than in any other philosophy on this site. Peter Lynch held well over a thousand positions at Magellan and treated breadth as a research pipeline; Philip Fisher argued for a handful of companies researched deeply.
What they share is an expectation that most positions will be unremarkable and a small number will do the work, which makes cutting winners early the characteristic mistake of the approach.
Time horizon
Multi-year, because the case rests on earnings compounding rather than on a price correcting. Lynch held individual positions around three years on average, while investors backing an unproven technology may be underwriting a decade.
Where the approach can work well
- It participates directly in the businesses that reshape industries, which a valuation-anchored approach often screens out by construction.
- The evidence is forward looking and often visible early to a customer or user before it appears in reported results.
- A portfolio only needs a few very large winners to work, which makes being wrong frequently survivable.
- The core test, comparing price against growth, is simple enough to apply across many companies quickly.
Limitations and criticisms
A balanced view includes where the approach struggles, presented neutrally.
- Growth is the most widely forecast variable in markets, and the consensus is usually already in the price.
- Fast growing companies and industries have often been poor investments precisely because expectations ran ahead of results, a pattern Jeremy Siegel documented as the growth trap.
- Drawdowns are severe when expectations reset, and the approach offers no valuation floor to fall back on.
- There is no natural sell discipline, so positions are frequently held too long after growth decelerates or sold far too early.
- Where a company has no earnings, the valuation rests almost entirely on assumptions that cannot be checked for years.
Common misconceptions
- The claim
Growth investing means ignoring valuation.
What is actually the caseSerious practitioners are explicit about price. Lynch's best known contribution is a valuation test, and the disagreement with value investors is about which inputs can be forecast, not about whether price matters.
- The claim
A fast growing company is a good investment.
What is actually the caseOnly if it grows more than the price assumes. The fastest growing sectors of several eras produced poor returns because investors paid in advance for growth that did arrive.
Investors associated with this approach
Listed because of a documented intellectual connection to the approach, not because they are well known.
In their words
“I do not want a lot of good investments; I want a few outstanding ones.”
Context: Fisher ran a deliberately concentrated portfolio backed by years of research on every holding. Standing alone the line argues against diversification, which is the opposite of what most investors need.
“Know what you own, and know why you own it.”
“The stock market is filled with individuals who know the price of everything, but the value of nothing.”
Strategies that put this into practice
A philosophy is what an investor believes. These are the procedures people run on the strength of it.
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Frequently asked questions
What is the difference between growth and value investing?
Value investing buys at a discount to a present estimate of worth. Growth investing pays a price that looks high on today's earnings because it expects those earnings to expand. The dividing line is which inputs each is willing to forecast, and in practice many investors do both at once.
What is the PEG ratio?
The price-to-earnings ratio divided by the earnings growth rate. It gives a rough single test of whether a fast growing company is actually expensive, and it lets companies growing at very different speeds be compared. Peter Lynch popularised it, though he did not invent it.
Why have fast growing sectors often disappointed investors?
Jeremy Siegel's finding that the fastest growing companies and industries have often been disappointing investments, because the growth was already reflected in the prices investors paid. It separates a good business from a good investment, which are different questions.
How do growth investors decide when to sell?
Less systematically than value investors, which is a genuine weakness of the approach. Because the thesis is about future earnings rather than a present discount, there is no natural exit point, and most practitioners sell when growth decelerates or when the original reasoning stops holding.
Is growth investing riskier than value investing?
It usually involves larger price swings and offers no valuation floor, so drawdowns tend to be deeper when expectations reset. Whether that counts as more risk depends on the definition: value portfolios have their own failure mode in businesses that are cheap because they are declining.
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Educational content only. This page explains how an investing approach works and where it falls short. It is not a recommendation to adopt it, not investment advice, and not a claim that any approach suits your circumstances.