Economic Moats: Why Some Profits Last
The durable advantages — brand, cost, network, switching costs — that keep competitors out.
When a business earns high profits, competitors swarm in to grab a shareA unit of ownership in a company. — usually driving those profits back down. A “moat” is whatever protects a company’s profits from that erosion, like a moat protects a castle.
- Brand — customers pay more for trust/identity (a cola, a luxury watch).
- Cost advantage — it can produce cheaper than anyone (scale, location, process).
- Network effects — each new user makes it more valuable (an exchangeA regulated marketplace where shares are bought and sold., a marketplace).
- Switching costs — leaving is painful or risky (enterprise software, your bank).
- IntangiblesNon-physical assets like brands, patents and software. — patents, licences, regulatory approvals rivals can’t easily get.
A moat is the single most important quality in a long-term holding. It’s the difference between a company that earns 20% returns for one year and one that earns them for twenty. Find durable moats and time does the rest — most lasting fortunes were built owning a handful of wide-moat businesses.
Common mistake“This company is super profitable right now, so it’s a great investment.” Without a moat, that profit invites competition and fades. High returns + no moat = a melting ice cube.
Key takeawayA moat is a durable advantage (brand, cost, network, switching costs, intangiblesNon-physical assets like brands, patents and software.) that protects profits from competition — the key to returns that last.
FAQs
How do I spot a moat?
Look for a company that has sustained high returns on capital and stable/growing market share for many years, and ask why competitors haven’t copied it. If you can name the specific barrier (brand, scale, network, switching cost), that’s the moat. If profits are high but you can’t explain why rivals stay out, be cautious.