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How to Assess a Company's Competitive Advantage: The Economic Moat
Key takeaways
- An economic moat is a lasting competitive advantage that protects a company's profitability against competition.
- The strongest moats come from switching costs, network effects, brand strength, or cost leadership.
- A moat alone is not enough — the company must also grow or allocate capital wisely.
- Assessing a moat requires looking at margins, ROCE, and market position over time — not just a single year.
- Investing in a company without understanding its moat is speculation, not investment.
An economic moat is a lasting structural advantage that prevents competitors from taking a company's customers, market share, and profits — preserving high profitability over the long term.
Why a Moat Matters
In a market economy, profits attract competition. When a new player enters a profitable segment, the original company's margins eventually compress. A company with a moat resists this pressure longer — or avoids it entirely. Investors pay a premium for companies whose moat is demonstrable and sustainable.
Types of Economic Moat
- Network effects: the more users, the more valuable the product (payment networks, platforms)
- Switching costs: moving to a competitor is expensive or painful (ERP systems, banking infrastructure)
- Intangible assets: strong brand, patents, licences, regulatory approvals
- Cost leadership: the company produces more cheaply than anyone else due to scale or technology
- Efficient scale: the market is so small it does not attract new entrants (local utilities)
How to Measure the Moat in Numbers
A moat is not measured by slogans — it is measured by numbers over time:
- ROCE (Return on Capital Employed) persistently above the cost of capital over 10+ years
- Operating margins stable or rising even through difficult periods
- Market share resilient to new market entrants
One strong year is not enough. Companies with a moat generate above-average returns persistently — even when the economic backdrop is not ideal.
A Moat Alone Is Not Sufficient
A company with a deep moat but poor capital allocation can stagnate. Watch what management does with free cash flow: buybacks, dividends, acquisitions, or capital expenditures. Analyses of specific companies can be found in the company reviews section. The basics of equity valuation are also covered in the overview dividend aristocrats.
FAQ
What is a company's economic moat?
A lasting structural competitive advantage that prevents rivals from taking the company's customers and profits. Companies with a deep moat maintain high margins and ROCE even under competitive pressure.
How do I know whether a company has a strong moat?
Track ROCE and operating margins over a 10-year horizon. A company with a moat sustains them persistently above the industry average. Ask: how difficult and expensive would it be to replicate its business with unlimited capital?
Is a moat enough to make a good investment?
Not entirely. A moat protects profitability, but the investment must also be at a reasonable price and the company must allocate capital efficiently. An overpriced company with a moat can deliver average returns or even a loss.