Not investment advice. Educational reading. See Disclaimer.
L.18 · BEGINNER · 3 MIN
Economic Moats
Warren Buffett popularized the term 'economic moat' — borrowed from the defensive water-filled trenches around medieval castles. A business with a wide moat can defend its profits from competitors for years or decades. A business without a moat will see its profits competed away as rivals enter. From an investor's perspective, moats are the difference between a business that compounds wealth indefinitely and one that earns good returns for a few years before the industry commoditizes.
Moats are not permanent. A brand can be damaged (think of consumer trust scandals). A technology switching cost can be disrupted by a better technology that makes migration worthwhile. Network effects can reverse if a competitor with a larger network enters. Your job is to assess not just whether a moat exists, but whether it is widening or narrowing.
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The test of a moat is pricing power: Can this company raise prices without losing significant market share? Buffett's favorite test — 'If you raise your price 10%, do customers leave?' — is the simplest moat diagnostic. Coca-Cola can raise the price of a Coke and most people keep buying. An airline that raises ticket prices 10% loses bookings to the competitor one tab over on Google Flights.
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On Oxford Ledge, look at ARCC (Ares Capital, a major BDC). Navigate to the company overview. Consider: what is ARCC's moat? (Hint: think about scale advantages, origination relationships, and the cost of capital for a large, well-rated BDC vs. a smaller competitor.) Then look at a company you know well personally — a brand you are loyal to. Why do you keep buying it? That loyalty is the moat in action.
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Pick a company you personally love — one whose products or services you use regularly. Which of the four moat types does it have: Brand, Switching Costs, Network Effects, or Cost Advantage? Now ask the harder question: could a well-funded startup replicate it in 5 years? If the answer is 'probably yes,' the moat may be weaker than it appears. If the answer is 'almost certainly no,' you have found something worth studying further.
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A local pizza restaurant has been operating for 30 years with loyal neighborhood customers. A national chain opens one block away offering lower prices. The local restaurant raises its prices slightly and keeps 80% of its customers. What type of moat does the local restaurant have?
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You find a business with 40% ROIC, 20% revenue growth. Stock trades at 35x earnings. Is this expensive?
Five questions · AI feedback
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Sit with the ideas.
You are evaluating two software companies. Company A has 2 million enterprise customers who have embedded its product into their core operations — switching requires 6-18 months of migration work and retraining. Company B has 3 million individual consumers who use its app for to-do lists and can switch to a competitor in 5 minutes. Which company has a stronger economic moat, and why?
