Rule #1

There are only two rules of investing: Rule #1: Don't lose money … and Rule #2: Don't forget Rule #1. Invest with certainty. The core principle of Rule #1 investing is to avoid losing money by investing with certainty. This approach challenges conventional wisdom that higher returns necessarily mean higher risk. Instead, it focuses on buying high-quality businesses at discounted prices, providing a margin of safety that reduces risk while potentially increasing returns. Rule #1 investing empowers individual investors to outperform professional fund managers by leveraging their size advantage a

Lesson 1: Buy Wonderful Businesses at Attractive Prices

This principle from Rule #1 is backed by Phil Town's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

Lesson 2: The Four Ms: Meaning, Moat, Management, and Margin of Safety

This principle from Rule #1 is backed by Phil Town's extensive research and real-world examples. Understanding it deeply can shift how you approach decisions, relationships, and long-term planning in meaningful ways.

How to Apply Rule #1's Lessons

The real value of Rule #1 lies in its applicability. After reading, the most important step is identifying which of Phil Town's principles speak most directly to your current situation.

Consider keeping a journal while reading — noting where the ideas challenge your current approach and where they confirm what you already suspected. The friction of your own resistance often points to the most important insights.

Key Quote

"Buy Wonderful Businesses at Attractive Prices" — Phil Town, Rule #1

About the Author

Phil Town is the author of Rule #1. The book reflects years of research, observation, and synthesis of evidence from multiple disciplines.