GARP Investing: A Guide to Buying Growth at a Reasonable Price

The PEG ratio divides the P/E by the annual earnings growth rate expressed as a whole number.

PEG = P/E ÷ Earnings Growth Rate (%)

A company at 24× earnings growing at 20% has a PEG of 1.2. One at 18× growing at 22% has a PEG of 0.82 — cheaper on this measure despite the second company being more expensive on nothing else. The conventional reading:

The four ways PEG below 1 misleads

• The growth rate is a peak, not a trend. A cyclical business at the top of its cycle shows enormous trailing earnings growth and a tiny PEG. This is the most common false signal in any GARP screen — semiconductors, homebuilders and commodity producers generate it every cycle.
• The growth is a recovery from a depressed base. A company that earned $0.20 after a bad year and now earns $0.60 posts 200% growth. That is a base effect, not a growth rate, and it will not repeat.
• The growth is bought rather than earned. Earnings growing through acquisitions or debt-funded buybacks appears identical in the PEG denominator to organic growth, and is worth considerably less.
• PEG ignores the balance sheet completely. A company at a PEG of 0.7 with net debt at 5× EBITDA is not cheaper than one at 1.1 with net cash. The first has a fixed claim ahead of you that the ratio never sees.

A fifth, subtler problem: PEG is close to useless at low growth rates. A company growing at 2% with a P/E of 10 has a PEG of 5.0, which reads as wildly expensive, when in fact a stable business at 10× earnings may be perfectly reasonable. Below roughly 8% growth, stop using PEG and use free cash flow yield instead.

The PEG ratio has a well-defined numerator and a contested denominator. Which growth rate you use changes the answer substantially, and neither choice is obviously right.

The practical approach is to calculate both and treat the gap as the finding rather than a nuisance.

• Forward materially better than trailing — the market expects an acceleration. Find out what specifically drives it: a new product, a completed capacity expansion, a margin programme. If nothing concrete supports it, the estimate is extrapolation and the low forward PEG is an artefact.
• Trailing materially better than forward — analysts expect deceleration. They are frequently right, because they are closer to the company's guidance than you are. A cheap trailing PEG here is often the last reading before a de-rating.
• Both similar — the most trustworthy case, and the one where a PEG below 1.0 means what it appears to mean.

One consistent rule: use the same basis on both sides of the ratio. Forward P/E with trailing growth, or trailing P/E with forward growth, produces a number with no interpretation at all, and mixed-basis PEG is quoted more often than one would hope.

The PEG ratio assumes the growth rate persists. Nothing in the calculation tests that assumption, and it is the assumption that decides the outcome. Growth rates mean-revert hard — the base rate for a company sustaining 20%+ earnings growth over ten years is low.

Six tests, ordered by how much they tell you:

1. 1Does revenue growth support earnings growth? Earnings growing much faster than revenue means margins are expanding or the share count is shrinking. Margins have a ceiling and buybacks need cash. Neither is a growth engine — both are one-time effects spread over several years.
2. 2Is return on invested capital stable or rising? A company growing earnings while ROIC falls is deploying capital at declining returns. The growth is real and increasingly expensive, and it stops when the cheap opportunities run out.
3. 3Is the growth organic or acquired? Strip out acquisitions and look at same-business growth. Roll-up strategies can post a decade of impressive consolidated growth while every underlying unit stagnates, and the strategy ends when targets get expensive or credit tightens.
4. 4How concentrated is it? If one product, one customer or one geography drives most of the growth, the durable growth rate is whatever that single source can sustain — and it has an end date you can often estimate.
5. 5What is the reinvestment runway? A retailer with 400 stores in a market that supports 2,000 has a decade of visible growth. One with 1,900 does not, regardless of how fast it grew getting there.
6. 6Is there a moat, and is it strengthening? Growth attracts competition by definition. Something has to prevent competitors from taking it.

Test 1 is the one to run first because it is fast and it catches the most common flattering pattern. Five years of 18% earnings growth on 4% revenue growth is a margin and buyback story reaching the end of its runway, and it will be priced as a growth story until it very publicly is not.

Every growth business eventually decelerates. The GARP question is whether a slowdown is a temporary dip or the transition to a different kind of company — because the answer determines whether you hold or whether the stock has left the strategy.

The mechanical risk is severe and worth stating plainly. A business at 25× earnings growing 20% that decelerates to 8% will typically re-rate toward 14–16×. That is a 40% price fall from multiple compression alone, before any earnings disappointment. Deceleration in a GARP holding is not a marginal event.

Distinguishing a dip from a transition

The capital allocation row is the most honest signal available. When a management team that reinvested everything for a decade starts initiating a dividend and increasing buybacks, they are telling you they can no longer find high-return projects. That is a considered statement about the growth runway, and it is usually correct.

What to do in each case: for a genuine dip in a business with an intact moat and runway, deceleration is often the buying opportunity, since the multiple compresses on a growth rate that recovers. For a structural transition, re-underwrite the position from scratch as a value or dividend holding — at the multiple appropriate to 6% growth, not 20%. Frequently the honest conclusion is that it is no longer attractive, and the discipline is to sell a good company because it is no longer the investment you made.

Earnings growth funded by borrowing looks identical to organic growth in the PEG denominator, and it is worth far less. Leverage amplifies returns while conditions hold and converts an ordinary slowdown into a permanent capital loss when they do not.

What to look at:

• Net debt trend against EBITDA trend. If debt is growing faster than EBITDA for three or more years, the growth is being financed rather than generated. This is the single clearest test.
• Free cash flow versus net income. A company reporting rising earnings while free cash flow stays flat or negative is funding the gap somewhere, and the balance sheet shows where.
• Share count alongside earnings per share. EPS growing while the share count falls sharply means buybacks are doing the work. Check whether those buybacks were funded from free cash flow or from the revolver — debt-funded buybacks are leverage dressed as shareholder returns.
• Interest cover — EBIT divided by interest expense. Below 4× leaves no room for a bad year. Below 2.5× means the lenders effectively control capital allocation.
• The maturity schedule, not just the total. Debt maturing in the next two years into a higher rate environment is a different risk from the same amount maturing in 2034, and the headline leverage ratio treats them identically.
• Acquisition accounting. Serial acquirers can capitalise costs, write off "one-off" integration expenses year after year, and post consolidated growth that no underlying business generated.

Lynch's debt-to-equity limit of 0.6 was a blunt version of this check, and it remains useful precisely because it is blunt. A GARP candidate should generally be able to fund its own growth. If it cannot, the growth belongs partly to the lenders.

Standard PEG penalises dividend-paying companies unfairly. A business returning half its earnings as dividends grows more slowly by construction, which inflates its PEG — while the shareholder receives the difference in cash. Lynch's adjustment adds the yield back into the denominator:

PEGY = P/E ÷ (Earnings Growth Rate + Dividend Yield)

A company at 16× earnings growing 9% with a 3.5% yield has a PEG of 1.78 — apparently expensive. Its PEGY is 16 ÷ 12.5 = 1.28, which is a fairer statement of what the shareholder actually receives.

PEGY is the right measure whenever the dividend yield is above roughly 2%, and it is what makes GARP and dividend growth investing compatible rather than competing. Many of the best long-run holdings screen poorly on raw PEG and well on PEGY: mature consumer, healthcare and industrial businesses growing 8–10% while paying out 3%.

Where it breaks

• It assumes the dividend is safe. A 9% yield on a business about to cut produces an excellent PEGY and a terrible investment. Check coverage before using it.
• It quietly rewards very high yields, which are frequently a distress signal rather than a return. Apply a sanity ceiling — a yield above 7% should be investigated, not added to a denominator.
• It ignores buybacks, which are economically similar to dividends. For a company returning capital primarily through repurchases, adding the buyback yield is the consistent treatment.

This is the central GARP insight, and the one that value investors most often reject on instinct. Two companies, both earning $2.00 per share today:

On the earnings the businesses will actually produce, the company at 30× is roughly twice as cheap as the one at 12×. Every dollar invested in Company A buys a claim on far more future earnings, and the apparent premium is repaid within a few years of compounding.

This is not an argument for paying any price for growth. It is an argument that the multiple alone answers nothing, and that the comparison only holds under three conditions:

1. 1The growth is durable for the full period. Ten years of 20% is a demanding assumption, met by a small minority of companies. If growth halves after year four the arithmetic changes completely.
2. 2The multiple does not compress faster than earnings grow. Company A re-rating from 30× to 15× costs you half your return, and a decelerating growth rate causes exactly that.
3. 3The growth is earned, not bought. Growth funded by debt or acquisitions carries risk that the earnings figure does not disclose.

The GARP resolution is to take the insight and cap it: pay above-average multiples for above-average growth, but not the multiples the market attaches to the fastest growers, where all three conditions must hold perfectly for the price to make sense. A PEG ceiling of 1.0–1.5 is exactly this discipline expressed as a number.

A growth rate without a moat is a forecast that competitors have not yet invalidated. Growth attracts capital; capital competes away returns. Something must prevent that, and the something is what you are actually buying.

The five recognised sources of durable advantage, with the evidence that confirms each is real rather than asserted:

The single most useful quantitative test is return on invested capital sustained above the cost of capital for a decade. In a competitive market, excess returns get competed away. A business that has earned 20% ROIC for ten years has demonstrated a barrier — you may not have identified what it is, but the evidence says it exists.

Equally, the strongest disconfirming test: is ROIC declining? A narrowing moat shows up in returns on capital long before it shows up in revenue. A company whose ROIC has fallen from 22% to 14% over five years while revenue kept growing is losing its advantage, and the growth is being bought at a rising price.

What does not count as a moat, despite being cited constantly: being first, being large, having good management, or having a superior product. Each is real and none is durable on its own — all four are routinely overcome by a competitor with capital and time.

Everything above, condensed into a checklist to run before buying. A candidate should clear all four groups; failing any one is a reason to stop rather than to compensate elsewhere.

Growth — is it there and is it real?

• EPS growth 10–25% annually over five years, with no loss-making year
• Revenue growth supports the earnings growth — not margin expansion or buybacks alone
• Growth is organic; acquisitions stripped out, the underlying business still grows
• Consistency over average — steady 12% beats a volatile 18%

Quality — is the growth worth having?

• Return on invested capital above 12%, stable or rising over five years
• Return on equity above 15%
• Free cash flow at least 80% of net income, averaged over five years
• An identifiable moat, with quantitative evidence rather than a narrative

Safety — what happens if growth stops?

• Net debt / EBITDA below 2.5×
• Interest cover above 6×
• Current ratio at or above 1.0
• No single customer above 20% of revenue, no single product above 50% of profits
• No significant debt maturing within twenty-four months

Price — are you paying a reasonable amount?

• PEG at or below 1.0, on both trailing and forward growth
• PEGY at or below 1.2 where the dividend yield exceeds 2%
• P/E below the 60th percentile of the company's own ten-year range
• The implied growth rate from a reverse DCF is lower than the company's five-year delivered growth

The last item is the strongest single filter in the list. If the price only works when the company grows faster than it ever has, you are not buying growth at a reasonable price — you are buying an acceleration on credit.