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What it argues
The Little Book That Builds Wealth is Pat Dorsey's case for a single, tractable framework for equity investing: find companies with durable competitive advantages — what Warren Buffett calls economic moats — buy them at reasonable prices, and hold them. Dorsey spent years as director of equity research at Morningstar, where he developed and refined the moat framework for rating thousands of stocks. The book is the distilled version of that work, written for investors who want to think like analysts without the jargon.
The core of the book is a taxonomy of moats. Dorsey identifies four genuine sources of durable competitive advantage: intangible assets (brand, patents, regulatory licenses), switching costs (how painful it is for a customer to leave), the network effect (value that increases as more people use the product), and cost advantages (structural efficiency that competitors cannot easily replicate). He is careful to distinguish these from things that look like moats but aren't: market share, excellent management, good products, and operational execution. A company can have all of those and still lose its edge within a decade.
What it gets right
- 1.
An economic moat is a durable structural advantage that allows a company to earn above-average returns on capital for an extended period.
- 2.
The four genuine moat sources are intangible assets, switching costs, the network effect, and cost advantages. Everything else is temporary or imitable.
- 3.
Market share, good products, and strong management are not moats. They can evaporate quickly when conditions change.
What it covers
Who wrote it
Pat Dorsey served as director of equity research at Morningstar for over a decade, where he developed the firm's economic moat framework and oversaw analysis of thousands of publicly traded companies. He later founded Dorsey Asset Management, a value-focused investment firm. He is also the author of The Five Rules for Successful Stock Investing. His work is grounded in the intellectual tradition of Warren Buffett and Charlie Munger, emphasizing durable competitive advantages over short-term financial metrics.
