Wide Moat Stocks: Companies With Durable Competitive Advantages

Why Moats Matter More Than Growth

In the long run, a company's profitability is determined by its competitive position — not its growth rate. A fast-growing company without a moat will see competitors pile in, margins compress, and returns on capital decline to the cost of capital. A slow-growing company with a wide moat can sustain above-average returns for decades.

Warren Buffett puts it simply: "In business, I look for economic castles protected by unbreachable moats."

The Three Pillars of Our Moat Rating

1. ROIC Stability (40% of rating)

Return on Invested Capital (ROIC) measures how efficiently a company turns capital into profit. A company that consistently earns 15%+ ROIC over a decade almost certainly has a competitive advantage — something prevents competitors from replicating its returns.

We measure the standard deviation of ROIC over 10 years. Low variance with a high mean is the gold standard — it means the moat is both wide and stable.

2. Gross Margin Trend (30% of rating)

Gross margin is the most direct measure of pricing power. If margins are expanding over time, the company is either raising prices faster than costs (brand power) or reducing costs faster than prices fall (scale advantage).

If margins are compressing, competitors are forcing the company to cut prices or spend more to maintain share — a sign of moat erosion.

3. Switching Cost Estimate (30% of rating)

This is our most qualitative factor. We approximate switching costs from the current gross margin level — companies with very high margins (60%+) typically have something that prevents customers from leaving, whether it's ecosystem lock-in, regulatory barriers, or integration complexity.

A low margin (below 20%) usually indicates a commoditized business with little customer stickiness.

Wide Moat + Fair Price = The Best Combination

The stocks below have moat ratings of 3.5 stars or higher. But a wide moat at any price isn't necessarily a good investment — check the margin of safety on each card to see if you're also getting a reasonable price.