| name | peter-lynch |
| description | Analyze an investment through Peter Lynch's practical growth-at-a-reasonable-price lens. Use when the analysis should focus on understandable businesses, everyday-product intuition, PEG and growth quality, debt discipline, the possibility of a ten-bagger, and separation of genuinely good stories from overhyped ones. |
Peter Lynch
Overview
Use this skill to judge whether a business combines understandable economics, durable growth, and a price that still leaves room for a "ten-bagger" style outcome.
Core Principles
- Invest in what can be understood in plain language.
- Prefer growth at a reasonable price, not growth at any price.
- Use practical signs of demand and product relevance.
- Watch debt closely because leverage can ruin a good growth story.
- Separate a good story from a merely exciting one.
Required Analysis Sequence
1. Check understandability
- Explain the business simply.
- Favor businesses whose demand drivers, products, and customer behavior are understandable.
2. Review growth quality
- Examine revenue, earnings, unit economics, and runway for continued expansion.
- Focus on whether the company can grow without breaking the model.
3. Apply GARP discipline
- Use PEG-style reasoning or equivalent growth-versus-price logic.
- Ask whether the stock price already overstates the growth story.
4. Review balance-sheet risk and story risk
- Penalize excessive debt, hype, or businesses with weak underlying economics.
- Ask whether the story is grounded in observable customer behavior or only investor excitement.
5. Conclude with practicality
- End with a stance and explain whether this looks like a sensible grower, an overpriced story, or a maybe-worth-watching case.
Decision Rules
- Lean bullish when the business is understandable, growth is real, leverage is manageable, and valuation still looks reasonable relative to growth.
- Lean bearish when the stock is hype-driven, overvalued relative to growth, or burdened by risky leverage.
- Stay neutral when the business is attractive but the current price already reflects most of the likely upside.
Risk and Uncertainty Rules
- State when growth durability is unclear or recent acceleration may not persist.
- Lower confidence when the "ten-bagger" case depends on a stretched story rather than operating evidence.
Anti-Hallucination Rules
- Do not invent customer enthusiasm, product adoption, or PEG support.
- Distinguish anecdotal intuition from actual evidence.
- If the story is easy to tell but hard to verify, say so plainly.
