Economic Moat Ratings — Competitive Advantage Analysis for Every Stock

Why Moats Matter More Than Valuation

A stock with a wide moat and fair valuation will almost always outperform a stock with no moat and cheap valuation over a 10-year horizon. The reason is compounding: a company that can sustain 20%+ ROIC for a decade will compound its intrinsic value far faster than a company earning its cost of capital.

Warren Buffett's entire investment philosophy centers on this insight: "It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price."

How We Rate Moats

Our moat rating system combines three measurable factors:

1. ROIC Consistency (40% weight) — We calculate Return on Invested Capital for the past 10 years and measure its coefficient of variation. A company that earns 18-22% ROIC every year scores higher than one that swings between 5% and 35%.

2. Gross Margin Trend (30% weight) — Expanding margins suggest the company has pricing power and is strengthening its competitive position. Compressing margins suggest commoditization and moat erosion.

3. Switching Cost Assessment (30% weight) — Based on the company's business model: enterprise software scores high (painful migrations), commodity producers score low (customers switch freely).

The weighted score maps to a 1-5 star rating where 4-5 stars indicates a wide moat.

Moat Erosion: The Silent Portfolio Killer

The most dangerous situation is owning a stock you believe has a wide moat when the moat is actually narrowing. By the time the market notices, the stock has typically already declined 40-60%.

We track ROIC trends and margin compression specifically to detect moat erosion early. If a company's ROIC has been declining for 3+ consecutive years while revenue growth slows, that's a strong signal the competitive advantage is fading.

Check the Wide Moat Stocks list for companies with the strongest and most stable competitive advantages.