What is a moat and why do investors care?

Full Explanation

Warren Buffett coined the term for businesses with defensible competitive advantages. Strong moats justify higher valuations because competitors cannot easily replicate or displace the company. Moat types: (1) Brand (luxury goods, consumer trust), (2) Network Effects (Uber drivers want to be where passengers are; value grows with scale), (3) Switching Costs (enterprise software, financial platforms — high switching cost means customer lock-in), (4) Scale (dominant players achieve cost advantages competitors cannot match), (5) Proprietary Technology (patents, trade secrets, data advantage). For SaaS, strong moats include: deep switching costs (critical to business operations, integrated across departments), high customer NRR (expanding into customer), and network effects (two-sided platforms, knowledge sharing). Companies without clear moats are vulnerable to competition and trade on growth alone; any growth slowdown depresses valuation. For investors, identifying moat strength is critical: a company growing 20% without moat is riskier than one growing 10% with strong moat, because the former can be disrupted by competitors while the latter has time to maintain position. Founders should continuously strengthen moats by: deepening customer relationships, building network effects, increasing switching costs, and accumulating proprietary data/technology.

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