peter-lynch

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.