Peter Lynch's Investing Approach
From 1977 to 1990, Lynch turned Fidelity's Magellan Fund into the best-performing mutual fund in history, averaging 29.2% annual returns.
Who is Peter Lynch?
Peter Lynch managed the Magellan Fund from $18 million to $14 billion, delivering a 29.2% CAGR over 13 years. His philosophy was deceptively simple: invest in what you know. His books One Up on Wall Street and Beating the Street democratized stock picking for everyday investors.
Lynch's stock classification
Lynch categorized every stock into one of six types. Knowing the category shapes your expectations and strategy.
| Category | Growth Rate | Example | Strategy |
|---|---|---|---|
| Slow Growers | 2–4% | Utilities | Buy for dividends |
| Stalwarts | 10–12% | Coca-Cola, P&G | Buy on dips, sell at 30–50% gain |
| Fast Growers | 20–25%+ | Tech startups | Hold while growth continues |
| Cyclicals | Varies | Auto, airlines | Time the cycle |
| Turnarounds | N/A | Near-bankrupt firms | High risk, high reward |
| Asset Plays | N/A | Land-rich companies | Wait for asset revaluation |
Lynch's favorite metric
Undervalued
Fairly valued
Overvalued
A P/E of 20 for a company growing at 25% gives a PEG of 0.8 — a potential bargain. The same P/E for a 10% grower gives a PEG of 2.0 — potentially overpriced. Lynch used PEG to find fast growers that Wall Street hadn't fully priced in.
Calculate PEG for any stock
PEG Ratio Calculator
LiveP/E Ratio
20.0
Growth
20%
PEG Ratio
1.0
Fairly ValuedLynch's investing checklist
Invest in what you know
Your everyday observations — products you love, stores that are always busy — are powerful research.
Do your homework
Know the story: why do you own it? What needs to happen for it to work? If you can't explain it, don't buy it.
Earnings, earnings, earnings
In the long run, stock prices follow earnings. Focus on companies with consistent, growing earnings.
Avoid the hot stock
By the time a stock is on the cover of magazines, the easy money has been made. Look where nobody's looking.
When to sell
Lynch was clear about selling signals — knowing when to exit is as important as knowing when to buy.
The story has changed — the reason you bought no longer holds
The P/E ratio exceeds the growth rate (PEG > 2)
Insiders are selling aggressively
The company is diversifying into unrelated businesses (diworsification)
Institutional ownership exceeds 60% — the easy gains are over