Scoring a Stock the Buffett Way
A score is only useful if you know what it measures. The ValueOS Score borrows Buffett's own decision frame — is this a business he would want to own? He answers that with three questions: is it high-quality, is its balance sheet strong, and is the price sensible? We turn those into three sub-scores and combine them into a single 0–100 rating.
Business Qualitylooks at returns on capital, margin consistency, and the hallmarks of a durable advantage. A company that compounds capital at high rates for a decade behaves like the “wonderful business” Buffett chases; one whose returns swing with the cycle is closer to a commodity. The lens is the same owner earnings idea he applies when judging whether management is creating or destroying value.
Financial Strength scores the balance sheet — debt relative to equity, interest coverage, and liquidity. Buffett prizes businesses that can survive a bad year without begging the bank. Low leverage plus ample cash is exactly what lets a great company act while rivals are forced to retreat, which is why we weight it as heavily as growth.
Valuation is the discipline that keeps a good business from becoming a bad purchase. We compare the market price to an intrinsic value estimate built from owner earnings and surface the gap as the margin of safety. Our Margin of Safety ranking lists the covered stocks currently trading below that bar.
The three sub-scores are combined so quality and strength are never overridden by a cheap price alone. A “cigar-butt” may score high on valuation and still rank low overall — the nuance Buffett absorbed from Charlie Munger. Read the sub-scores, not just the total, before drawing any conclusion about a stock.
None of this is a forecast. The Score describes how a business measures up to Buffett's criteria today; it says nothing about next quarter. For the full picture, open the matching letter annotations — his 1986 letter on why reported earnings mislead and the 1992 letter on intrinsic value — then pair any Score with a Moat analysis and a DCF to judge both quality and price.
Worked Example — Apple (AAPL)
Apple is a clean illustration of why Buffett weighs both quality and price. It earns a near-perfect Quality score — a durable moat and a rock-solid balance sheet — while its Valuation score swings with the share price.
The composite Scoretells you whether, at today's price, AAPL clears his bar. Type any ticker into the Score calculator to see where it lands across our 5,000+ coverage universe.
Frequently Asked Questions
How does the ValueOS Score work?
Buffett judges a business on three questions: is it high-quality, is its balance sheet strong, and is the price sensible? The ValueOS Score compresses those into one 0–100 number built from public SEC filings — business quality (returns on capital, margin consistency), financial strength (low debt, ample liquidity), and valuation (price versus intrinsic value). A higher score means a business that looks more attractive by his criteria.
What are the three sub-scores?
Business Quality scores durable competitive advantage and capital efficiency; Financial Strength scores balance-sheet resilience; Valuation scores how cheap the stock is relative to what the business is worth. The composite weights them so a wonderful business at a fair price still beats a mediocre one at a silly price — the same priority Buffett learned from Charlie Munger.
What is a good ValueOS Score?
There is no universal cut-off, but a score above roughly 70 usually means a high-quality, financially sound business trading at a reasonable price. Scores in the 40–70 range are mixed, and below 40 typically signals weak moats, fragile balance sheets, or stretched valuations. Always read the three sub-scores, not just the total.
Does a high score mean I should buy the stock?
No. The Score ranks businesses by Buffett-style criteria; it is not a buy signal or a forecast. As Buffett notes, price decides whether an excellent business is a good investment. Pair the Score with a Moat analysis and a DCF, and treat the result as one input in your own research — not as investment advice.
Where does the Score get its data?
Every figure comes from public SEC EDGAR XBRL filings — income statements, balance sheets, and cash-flow statements. We never use estimates or AI-generated numbers; the inputs are the same primary disclosures Buffett reads, so the score reflects reported reality rather than a model's opinion.
Is the ValueOS Score free?
Yes. The Score, Moat Analyzer, and DCF Calculator are all free and built from primary SEC data — no account or subscription required.
DCF vs. Moat vs. Score — Which Tool?
| Dimension | DCF Calculator Intrinsic value from cash flows | Moat Analyzer Durable competitive advantage | ValueOS Score Quality + value composite |
|---|---|---|---|
| What it measures | Price vs. conservative intrinsic value (margin of safety) | Quality of the business (brand, switching costs, network, scale) | Both business quality and valuation in one composite |
| Best for | Judging whether a stock is cheap or expensive right now | Finding wonderful businesses worth holding for decades | Screening a universe of stocks for the best risk-adjusted bets |
| Your input | Free cash flow from SEC filings + your growth & discount assumptions | Moat signals traced across 60 years of Berkshire letters + fundamentals | 5,000+ covered stocks scored from SEC filings on Buffett's dimensions |
| What you get | Intrinsic value per share vs. live market price | Moat rating + the letters that reveal the thesis | 0–100 Score ranking quality against price |
Buffett weighs both price and quality. Most investors run a Score to find candidates, a Moat check to confirm the business is durable, and a DCF to make sure the price leaves a margin of safety.