Return on equity measures how much net profit a company produces for every dollar of shareholder capital invested in it. It answers the owner’s question directly: how hard is the money I have tied up in this business actually working?
A consistently high ROE is one of the clearest signals of a quality business, because it shows management can reinvest shareholders’ capital at an attractive rate — the engine of long-term compounding.
DuPont analysis breaks it into three drivers: ROE = net margin × asset turnover × financial leverage, which shows whether a high ROE comes from profitability, efficiency, or debt.
Suppose a company earns $12,000M in net income on $60,000M of shareholders’ equity:
The company generates 20 cents of profit a year for every dollar of equity — a strong figure that, if sustained and reinvested, compounds owners’ capital quickly.
Compare ROE within an industry rather than across very different ones, since typical levels vary widely. A durable, above-average ROE that holds up over many years often points to a real competitive advantage.
Use DuPont analysis to see why a company’s ROE is high — healthy margins are a better sign than heavy leverage doing the work.
ROE is central to identifying compounding, quality businesses and to any owner-return way of thinking about a stock. It is a favourite of long-term investors precisely because it captures reinvestment quality.
Debt flatters ROE: a heavily leveraged company can post a high figure while carrying real risk, because borrowing shrinks the equity base in the denominator. Share buybacks do the same. And when equity is negative — after years of losses or large buybacks — the ratio becomes meaningless. Always read ROE next to leverage and ROA.