Return on equity is the single ratio Warren Buffett checks first, and for good reason: it measures how much profit a company squeezes out of every dollar shareholders have entrusted to it. But raw ROE lies as often as it tells the truth. A 35% figure can mean a wide-moat compounder or a debt-loaded company one bad quarter from trouble. This guide shows you how to screen for ROE the right way.
What ROE Actually Measures
Return on equity is net income divided by shareholders' equity. If a company earns $200 million on $1 billion of equity, its ROE is 20%. That number tells you the annual return management generates on the capital base owners have built up through retained earnings and stock issuance. A sustained 20% ROE means the business can roughly double its equity every four years without raising outside money, the mathematical engine behind long-term compounding. As a rough benchmark, ROE below 10% signals weak capital efficiency, 10-15% is average, 15-20% is good, and consistent figures above 20% mark genuinely high-quality businesses. The key word is consistent: one strong year proves nothing. You want five to ten years of stable or rising ROE before trusting the number.
The DuPont Trap: Why High ROE Can Be Dangerous
The DuPont breakdown splits ROE into three drivers: net margin, asset turnover, and financial leverage (assets divided by equity). A company can post a stellar 30% ROE purely by loading up on debt, which shrinks the equity denominator and inflates the ratio. This is the most common way screeners get fooled. Always pair an ROE filter with a debt check. A practical rule: require ROE above 15% and debt-to-equity below 1.5. If a 30% ROE comes with a debt-to-equity of 4, the quality is borrowed, not earned. Compare two firms at 25% ROE: the one funding it through margins and turnover is far safer than the one funding it through leverage. The DuPont lens turns a single misleading number into three honest ones.
Pairing ROE With ROIC for the Full Picture
Return on invested capital (ROIC) is ROE's more honest cousin because it includes debt in the capital base. When ROE and ROIC are close, the high return is real and not a leverage illusion. When ROE towers over ROIC, leverage is doing the heavy lifting. A strong screen looks for ROE above 15% and ROIC above 10%, with the gap between them under about 10 percentage points. This combination filters out financially engineered returns while keeping genuine operators. For asset-light businesses like software, both numbers can run extremely high; for capital-intensive sectors like utilities or industrials, 12-15% ROIC is excellent. Always judge the figure against the sector, not the whole market.
ROE Thresholds by Sector
A blanket ROE cutoff buries strong companies in capital-heavy sectors and lets weak ones slip through in asset-light ones. Software and consumer brands routinely post 25-40% ROE because they need little physical capital, so set the bar near 20% there. Banks and financials look high on ROE by nature of their leverage, so 12-15% combined with a healthy capital ratio is the realistic target. Utilities, telecoms, and heavy industrials operate on huge asset bases, where a steady 10-12% ROE is genuinely good. Retail and consumer staples typically land in the 15-20% range. The discipline is simple: screen within a sector, rank by ROE, and look for companies in the top quartile of their peers rather than the top quartile of the market.
ROE vs Return on Assets: Reading Them Together
Return on assets (ROA) divides net income by total assets and ignores how the business is financed, which makes it a useful sanity check against ROE. When ROE is high but ROA is mediocre, the gap is being filled by leverage rather than operating quality. A company with 25% ROE and only 4% ROA is borrowing heavily; one with 25% ROE and 15% ROA is genuinely efficient. The ratio of ROE to ROA roughly tracks the equity multiplier, so a large spread is a leverage warning. For non-financial companies, look for ROA above 5% as a floor and treat anything above 10% as a sign of a capital-light, high-return operation. Reading the two ratios side by side stops you from rewarding balance-sheet risk and helps you find businesses that earn their returns from the income statement, not the debt schedule.
Spotting Falling ROE Before It Hurts
A declining ROE trend is one of the earliest warnings that a company's competitive edge is eroding. Margins compress as competitors arrive, asset turnover slips as the business gets bloated, and management often masks the slide by adding leverage to prop the headline number up. Pull up the ten-year ROE history and watch the direction, not just the latest figure. A business drifting from 22% to 14% over five years is deteriorating even though 14% still looks respectable in isolation. Cross-check whether the equity base is being inflated by buybacks, which shrink equity and can flatter ROE while the underlying economics weaken. The healthiest signal is an ROE that holds steady or climbs while debt stays flat, proof the company is compounding on operating strength rather than financial engineering.
Building Your ROE Screen on DeltaScreener
Start with a baseline filter of ROE above 15% over the trailing twelve months, then layer in the quality checks that protect you from the leverage trap. Add debt-to-equity below 1.5 to cut out borrowed returns, ROIC above 10% to confirm the return is real, and a net margin filter above your sector median to ensure profitability is driving the ratio. Finally, use the ten-year financials view to confirm ROE has been stable or rising rather than spiking on a one-time gain. This stacked approach turns ROE from a number that fools amateurs into a filter that surfaces durable compounders. Build this exact screen in minutes at deltascreener.com/screener and let the data separate the quality businesses from the leverage illusions.