What Is GARP? Peter Lynch's Framework for Finding Growth at a Reasonable Price

Peter Lynch ran Fidelity's Magellan Fund from 1977 to 1990, averaging 29.2% annual returns — more than double the S&P 500. He didn't do it by finding cigar-butt value stocks the way Graham did, nor by chasing hypergrowth the way a venture capitalist might. He looked for something in between: businesses growing faster than the market expected, available at valuations that hadn't yet priced in that growth.

“The P/E ratio of any company that's fairly priced will equal its growth rate.”

— Peter Lynch, One Up on Wall Street (1989)

The core GARP idea

GARP — Growth at a Reasonable Price — is not a rigid methodology. It's more of a disposition: an insistence that paying up for growth is fine, but only if the premium is justified by the growth rate. A company growing earnings at 30% per year is worth a higher P/E than one growing at 8%. The question is: how much higher?

Lynch's answer was the PEG ratio — a simple tool that normalises P/E by the earnings growth rate. If the P/E roughly equals the growth rate, Lynch considered the stock fairly valued. Below that, it was interesting. Above 2×, it was speculative territory where you were paying heavily for future promises that might not materialise.

What Lynch actually looked for

Lynch was famously pragmatic. He didn't build elaborate models. He looked for businesses where:

• The product or service was simple to understand and explain
• The company was growing faster than the market was pricing in — the "growth surprise" potential
• The stock was not heavily covered by Wall Street analysts (less competition for the discovery)
• The PEG ratio was below 1.0, or at worst below 1.5
• Insiders were buying, not selling

GARP vs pure value: the key difference

A pure value investor (in the Graham tradition) typically avoids paying above 15× earnings regardless of growth rate. This discipline protects against overpaying, but it also excludes many of the best businesses — the ones compounding at 15–20% per year that never trade below 20× earnings because the market has learned to pay for their consistency.

GARP relaxes this constraint: a company growing earnings at 20% per year and trading at 20× earnings might actually be cheap in relation to its growth. The key is not to relax the constraint so far that any growth story becomes justified.

Where GARP fails

The framework breaks down in two situations. First, when growth rates are inflated by one-time items, accounting adjustments, or unsustainable margins — the PEG looks attractive but the underlying engine is weaker than it appears. Second, during euphoric markets where the PEG ratios of growth stocks expand far beyond any reasonable range and GARP investors rationalise their way into overvalued positions.

Lynch himself acknowledged this: the PEG ratio is a starting point for analysis, not a substitute for it. A business with a PEG of 0.7 still needs to actually deliver the growth — if that growth deteriorates, the "reasonable price" can quickly become an expensive price.