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Moats and return on capital

A competitive advantage allows you to obtain superior returns without attracting a response that quickly destroys them. It should be seen in customer behavior and numbers, not just a well-known brand.

3 min read Practical guide

By the end

You will relate each moat assumption to evidence and return on capital.

Sources of advantage

Switching costs, network, scale, intangible assets and structurally lower costs are different mechanisms. Ask who pays, why it doesn't change and what prevents copying. A high fee is a result, not a sufficient explanation.

Financial evidence

Look for persistent margin and return on equity, retention, pricing power and growth without disproportionate investment. ROIC compares after-tax operating profit with required capital; must exceed the cost of capital during a cycle.

Example

Two companies grow 15%. One needs to reinvest 80 of every 100 of profit; another, 25. The second can distribute more cash or grow with less financing.

Reinvestment

A great business creates more value when it can still reinvest at high returns. Without opportunities, accumulating cash or purchasing expensive products reduces quality. Evaluates potential market and discipline of the management team.

How it erodes

Technology, regulation, new channels or dependence on a platform can reduce the advantage. Defines leading indicators: churn, price, quota, acquisition cost or incremental margin.

Causal mechanism.
Operational evidence.
Normalized ROIC.
Reinvestment space.
Threat and indicator of erosion.

From data to a decision

Does the company sustain returns against competitors?

This guide cannot predict the next move on its own. It can build a conditional reading: what supports upside, what increases downside risk, and which evidence must appear before acting.

Favourable reading

Pricing, retention, or unit cost hold up while the market grows.

Adverse reading

Share is bought through discounts and margin falls as competition appears.

Required confirmation

Look for evidence in margin, churn, share, ROIC, and customer commentary.

Reasoned example

Raising price 5% without losing volume suggests power; volume +20% with collapsing margin may be promotion.

Applied workshop

Turn the explanation into a process

Follow these steps in order and keep the result, so you can repeat the analysis and identify what changed your decision.

  1. 1Name the mechanism: switching cost, network, scale, brand, cost or regulated asset.
  2. 2Seek evidence in retention, pricing, share, margin and incremental returns, not adjectives.
  3. 3Compare those metrics with competitors across a full cycle.
  4. 4Define an annual erosion signal and estimate how much can be reinvested at high returns.

Review questions

  • Why can a rival not copy the economics?
  • Do customers or suppliers confirm the advantage?
  • Does growth strengthen or dilute the moat?

Worked case

Demonstrate a switching cost

A software claims to have switching costs. Check net retention, contract duration, implementation cost and ease of exporting data. 98% retention and accepted price increases support the hypothesis.

If a new rule requires portability and churn rises, the moat erodes. Define that metric before it happens.

Decision rule

Each advantage needs a mechanism, two observable tests and a sign of deterioration.

Put it into practice

Choose a supposed advantage and write the proof that it should be seen in customers, competitors and accounts. Also look for a piece of information that contradicts it.