Moat (Economic Moat)

An economic moat is a metaphor for a competitive advantage that is difficult to erode. Mechanisms can include durable cost advantages, switching costs, network effects, rights, and reputation. Each requires market-specific evidence; scale or early entry does not automatically establish one.

A moat is a claim about persistence, so attach it to a mechanism and a horizon. A low-cost producer may depend on difficult-to-replicate distribution; a specialist supplier may benefit from customer training and integration. Ask what a capable entrant would need to reproduce and whether buyers still value the protected offering.

An attractive business and an attractive purchase are different propositions. A durable advantage can already be reflected in an expensive price, while maintaining it requires investment. Extra users create a network effect only when they improve value for relevant participants. Name an erosion signal and account for the cost of keeping the advantage useful.

When to use it

When evaluating business sustainability beyond current performance; when strategic investment needs to prioritize moat-building over revenue growth; when assessing competitive threats and the structural barriers protecting against them; when investment analysis requires evaluating durability of competitive advantage.

How it can help

Identify the mechanism, maintenance cost, and how competitors could bypass it. Keep business quality separate from the purchase price.