Glossary
Returns & risk

ROE

Return on equity

How much profit the company generates on the money shareholders have in it.

ROE is a headline measure of quality: it tells you how efficiently management turns owners' capital into profit. Sustained high ROE is usually a sign of a genuine competitive advantage.

It has one large flaw. Debt increases it. A company can raise ROE simply by borrowing more and shrinking its equity base, without becoming any better at business. Always look at ROE alongside debt.

The formula
ROE = Net income ÷ Shareholders' equity
Figure

The only five moats there are

1
Brand
People pay more for the same thing
2
Switching costs
Leaving is painful or expensive
3
Network effects
It gets better as it gets bigger
4
Cost advantage
It can undercut and still profit
5
Scale in a small market
Not worth invading

If you cannot name which of these a company has, it probably does not have one. It is merely doing well, which is a different and far more temporary condition.

Why it matters

Consistently high ROE without heavy debt is one of the most reliable markers of a moat.

The mistake everyone makes

Admiring a high ROE that is entirely manufactured by leverage. Check the debt-to-equity ratio first.

Related terms

See ROE on a real company

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