Measuring the Moat: Competitive Advantage Analysis
A structured, checklist-driven way to diagnose whether a business truly has a durable competitive advantage.
- Difficulty
- Advanced
- Time to result
- ~months to results
- Steps
- 5
- Confidence
- 90%
Mauboussin's 'Measuring the Moat' framework synthesizes Porter's competitive strategy, Christensen's disruptive innovation, and capital-returns analysis into a systematic method for evaluating competitive advantage. A true moat requires two things: an absolute condition (returns above the cost of capital) and a relative condition (being better than competitors on a defined competitive set). The analysis proceeds through the industry's 'lay of the land' (entry/exit, market share stability, pricing power), industry dynamics (five forces, value chains, disruption theory), and finally identifies whether the advantage stems from being a low-cost producer (low margin, high capital velocity) or a differentiator (high margin, low capital velocity) — a distinction that can be read directly off the income statement.
Origin
The first version of Measuring the Moat was published in 2002 as an attempt to synthesize scattered strategy literature (Porter, Christensen, Brian Arthur) into one coherent, checklist-based tool investors and executives could actually apply.
Core principles
- 01A competitive advantage needs both an absolute standard (returns above cost of capital) and a relative standard (better than competitors).
- 02Low-cost producers monetize via high capital velocity and low margins; differentiators monetize via high margins and low capital velocity.
- 03Understanding entry and exit dynamics tells you where an industry sits in its consolidation lifecycle.
- 04A checklist forces systematic coverage of issues even if not every issue applies to every company.
How to run it
- 1
Define competitive advantage rigorously
Confirm the business earns returns above its cost of capital (absolute) and performs better than a clearly defined competitor set (relative).
Watch out Porter himself never explicitly defined competitive advantage — don't assume it's self-evident.
- 2
Map the lay of the land
Study entry and exit rates, market share volatility, and pricing flexibility to understand how stable the competitive field is.
Pro tip Industries with wild market-share swings make it hard for any single company to stay king of the hill.
- 3
Analyze industry dynamics
Apply Porter's five forces and value-chain analysis, and layer in Christensen's disruptive innovation theory to assess vulnerability to new entrants.
- 4
Identify the source of advantage
Determine whether the moat comes from being a low-cost producer (low margin, high capital velocity) or a differentiator (high margin, low capital velocity) by examining margins and capital turnover.
Pro tip Compare a supermarket (low margin, high velocity) to a jewelry store (high margin, low velocity) as anchor examples.
- 5
Run the checklist
Work through a structured checklist covering all the above dimensions to ensure no major issue is overlooked before forming a conclusion.
In the wild
A supermarket earns thin margins on each item but sells enormous volume (low margin, high capital velocity) — a classic low-cost producer. Tiffany's earns high margin per sale but sells far less frequently (high margin, low velocity) — a classic differentiator.
→ Just from the income statement structure, an analyst can infer which competitive strategy a company is pursuing.
Common mistakes
Assuming 'moat' is self-defining
Without the two-part absolute/relative test, people label businesses as having moats based on vague intuition rather than measurable returns.
Ignoring entry and exit statistics
Few investors study industry entry/exit cycles, missing signals about where an industry sits in its consolidation lifecycle.
Reading Porter's original texts without help
Porter's own books are described as rich but difficult; skipping accessible explainers can cause misapplication of the concepts.
Is it for you?
Best for
Analysts and executives assessing whether an established business has a durable, defensible advantage.
Not ideal for
Pre-revenue startups with no historical returns on capital to measure.
From the transcript
“we argue that a competitive advantage should have two features one is an absolute one one is a relative one”
“low margins high velocity that means you're turning your capital fast that's a low cost producer high margins and low capital velocity that's a differentiation”
“i was very specific about putting a checklist at the end and i think checklists are interesting just because they they force you to make…”
From the episode
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Michael Mauboussin