Warren Buffett's stock screening criteria
Warren Buffett's stock selection isn't a secret formula. It's a short list of demands a business has to meet before he'll own it. Wonderful economics, low debt, a price below value, and a business he actually understands. Here are the six quality criteria, and the concrete numbers each one translates into when you screen for it.
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01 A business you understand
Buffett only buys what he can explain: how the company makes money, why customers keep coming back, what could break it. If a business can't be summarized in a sentence, it goes in the “too hard” pile, no matter how good the numbers look.
02 A durable competitive advantage
A moat (brand, network effects, switching costs, cost advantage) protects profits from competitors. In the numbers, a moat shows up as high returns on capital that persist for years rather than getting competed away.
03 High returns on capital
Return on invested capital and return on equity measure how much profit a business generates per dollar put to work. Sustained readings above roughly 15% mark the genuinely high-quality compounders Buffett favors.
04 Low debt
A wonderful business doesn't need leverage to look wonderful. The cleanest test is how fast debt could be repaid: long-term debt under about three years of earnings, and net debt under three years of free cash flow, means bad years are survivable and management isn't borrowing to flatter returns.
05 Consistent growth
Earnings, equity, and cash-flow growth that compound steadily over ten years beat a single explosive year. Consistency is evidence the advantage is real and repeatable.
06 A price below value
Even a wonderful business is a poor investment at the wrong price. Buffett waits to buy below a conservative estimate of value, the margin of safety that protects against being wrong.
Turning the criteria into a stock screener
The first two criteria, understanding and moat, are judgment calls. The rest are measurable, and that's what makes them screenable. Filter for returns on capital above 15%, debt repayable in roughly three years of earnings, and a decade of steady growth, and a universe of thousands of companies collapses to a short list worth real research. Reading the quality scorecard walks through each metric in depth.
Then comes price. A company can ace every quality test and still be a bad buy if it's expensive. Estimate what it's worth with the intrinsic value calculator, then demand a margin of safety before buying. Quality tells you what to want; price tells you when to act.
Frequently asked questions
What are Warren Buffett's stock screening criteria?
Buffett looks for a business with a durable competitive advantage, an economic moat, plus high and consistent returns on capital, low debt, honest and capable management, and a business simple enough to understand. Then he insists on buying it for less than it is worth. In numbers, that often means sustained return on invested capital and equity above roughly 15%, debt low enough to repay in about three years of earnings, and a price well below intrinsic value. The ordering is the part most people skip. Quality comes first and price comes last. A cheap price on a business with deteriorating returns is not a bargain, it is a slower loss. Note also that the numeric bars are interpretations of his writing rather than a published checklist. He has never released one, and the spirit of the criteria travels better than the exact figures do.
Does Warren Buffett use a stock screener?
Buffett relies on judgment and decades of reading financial statements rather than a single screen, but his criteria translate cleanly into screenable filters: returns on capital, debt levels, growth consistency, and valuation. A screener narrows thousands of companies to a handful worth real research. It cannot replace the research itself. Be aware of what a screen structurally cannot see. Whether you understand the business, whether management is honest, and whether the moat is widening or narrowing are all judgments that live in the annual report, not in a database column. A screen is also backward-looking by construction, since every number in it already happened, and it will quietly reject good businesses whose latest year was distorted by a one-off charge. Treat the output as a reading list of ten to twenty names rather than an answer, and expect to reject most of them.
What return on equity does Buffett look for?
There is no official cutoff, but a common interpretation of his preference for highly profitable businesses is a return on equity sustained above about 15% over many years. Consistency matters more than a single high reading. A decade above 15% signals a durable advantage far more strongly than one excellent year does. Read return on equity alongside the debt, though, because the two interact. Equity is the denominator, so a company that borrows money to buy back its own shares shrinks that denominator and lifts return on equity without improving the underlying business at all. This is why return on invested capital, which counts debt as capital too, is the more reliable of the pair. A simple check is to compare the two across the same decade. If the gap between them has widened steadily, borrowing is doing the work, not the business.
What is an economic moat?
An economic moat is a durable competitive advantage that protects a business's profits from competitors: a strong brand, network effects, high switching costs, a cost advantage, or regulatory protection. In a screening context the practical question is how you detect one, since no data field is labelled moat. It shows up in the numbers as high returns on invested capital sustained over many years, which is why ROIC is the single most telling quality metric. Stable gross margins across a full economic cycle point the same way. Neither is proof. Both are evidence strong enough to justify reading the annual report, which is where you find out what the mechanism actually is. A screen can tell you a company has behaved as though it has a moat. Only reading tells you why, and only the why tells you whether it will still be there in ten years.
Can I apply Buffett's criteria to my own investing?
Yes. The criteria are public and the math is decades old. Nothing here requires special access or a professional terminal. The work is in gathering ten years of financials for each company, normalizing them so the years are comparable, and recomputing on every earnings report. That is genuinely tedious. Doing it by hand for a single company takes a couple of hours, and there are thousands of companies, which is the real reason most people never finish. A good way to start is to pick one business you already understand and work through its last ten years manually. Doing that once teaches more than reading about it ten times. Tools that automate the grind let you focus on the judgment the approach actually depends on: what you understand, and what it is worth to you. The arithmetic can be delegated. The judgment cannot.
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Wonderfolio is an educational research tool. It applies publicly known value-investing criteria to public data and is not affiliated with or endorsed by Warren Buffett or Berkshire Hathaway. Nothing here is personalized investment advice or a recommendation to buy or sell any security.