What is an economic moat?
In one line: A moat is a lasting advantage that protects a company from rivals, like a strong brand or high switching costs, so it can keep its customers and margins.
A simple example
Picture a castle with a wide moat of water around it. Attackers struggle to get in. A business moat works the same way against competitors.
Here's an illustration. Two coffee shops each sell a cup for $4 and earn $1 on it.
- Shop A has nothing special. A rival opens next door at $3.50. Shop A has to cut its price, and its $1 shrinks to $0.50.
- Shop B has loyal regulars and a famous name. The same rival opens. Most customers stay, and Shop B keeps most of its $1.
Shop B has a moat. Shop A doesn't.
The 4 common types
| Moat | What it means | Everyday example |
|---|---|---|
| Brand | People pay more or stay loyal because they trust the name | A soft-drink brand people ask for by name |
| Switching costs | Leaving is a pain, so customers stay | Moving all your company's files to new software |
| Network effect | More users make it more useful | A marketplace where buyers go because sellers are there |
| Cost advantage | It can make things cheaper than anyone else | A huge retailer buying in bulk |
Why it matters
Warren Buffett made the idea popular. His view: a business with a wide, lasting moat can keep earning strong returns for years, because competitors can't easily copy it. Our Warren Buffett story covers how he thinks.
A moat helps explain why some companies keep strong Free cash flow over time.
A common mistake
Confusing a hot product with a moat. A popular product can be copied. A moat is about whether the edge lasts once rivals try. Ask: "If a well-funded competitor tried tomorrow, what would stop them?"
Moats can shrink. New technology has worn down many advantages that once looked permanent. Check the moat again each year, not just once.
Questions
What is a wide moat?
A strong, long-lasting edge that rivals would find very hard to break, usually for many years.
Who came up with the economic moat?
Warren Buffett popularized the term in his letters and talks to Berkshire Hathaway shareholders.
Can a small company have a moat?
Yes. A small business can have loyal local customers, a special skill or high switching costs that protect it.
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