If you've ever looked at a stock and not known where to start, here's the framework Buffett actually uses, decomposed into five concrete pillars. Every Buffett Brain verdict on invest-like scores a stock on these five pillars and visualises the result as a radar chart. The framework is reproducible: any user can apply it manually to any stock.
This post walks through what each pillar is, the underlying metric, the published source (a Buffett letter year), and how to read the radar chart on the stock pages.
The five pillars at a glance
| # | Pillar | What it measures | Buffett's threshold |
|---|
| 1 | Moat | Structural competitive advantage | Sustained ROIC ≥ 15% over 10 years |
| 2 | Durability | Demand resilience and pricing power | Gross margin stable over 10 years |
| 3 | Management | Capital allocation track record | Owner-mindset signals, share buybacks at fair prices |
| 4 | Valuation | Price-to-value relationship | Owner-earnings yield ≥ 5% absolute |
| 5 | Financial Health | Balance sheet resilience | Current ratio ≥ 2, debt-to-equity moderate |
A stock that scores high on all five is what Buffett calls a "wonderful business at a fair price." A stock that scores high on quality (pillars 1-3) but fails valuation (4) is "wonderful business at unfair price" - passable to Munger, not to Buffett. A stock that scores high on valuation (4) but fails quality is the classic value trap.
Pillar 1: Moat
What it measures: The structural reasons a business can keep earning above-average returns over a long period.
Buffett's framing (paraphrased from multiple letters, particularly the 1986 "Mr. Market" passage and the 1997 "Wonderful Business" essay): "A truly great business must have an enduring 'moat' that protects excellent returns on invested capital. The dynamics of capitalism guarantee that competitors will repeatedly assault any business 'castle' that is earning high returns."
Quantitative test: Sustained ROIC (return on invested capital) ≥ 15% over a 10-year window. If the business can earn 15%+ on every dollar invested for a decade, something is structurally protecting those returns from competition.
Types of moats Buffett has named in letters:
- Brand: Coca-Cola, See's Candies, Apple
- Network effects: American Express, Visa, Mastercard
- Scale: Berkshire's reinsurance arm, Costco
- Regulatory: Moody's, Wells Fargo (historically), regulated utilities
- Switching costs: Intuitive Surgical (da Vinci), SAP, Adobe
On the radar chart: shown as the "Moat" axis. Score = 0-100 derived from current ROIC percentile vs sector and stability of ROIC over time.
Pillar 2: Durability
What it measures: How resilient the demand for the business's products is. Will people still want this in 20 years?
Buffett's framing (1996 letter): "The thing that companies you ought to think about owning is whether you can predict what they're going to look like in 10 or 20 years. Some businesses you can predict. Others, the change is so violent that you can't possibly predict."
Quantitative test: Gross margin stability over 10 years. A stable gross margin signals that customers value the product enough to pay for it consistently - they're not substituting away, the product isn't becoming a commodity.
Why margin stability matters: Coca-Cola's gross margin has barely moved in 50 years. That's durability. Compare to most consumer-electronics companies where gross margin compresses every 3 years as products become commoditised.
On the radar chart: shown as the "Durability" axis. Score = 0-100 derived from gross-margin stability + revenue-growth consistency.
Pillar 3: Management
What it measures: Whether the people running the business have an owner mindset and a track record of allocating capital well.
Buffett's framing (multiple letters, particularly the 1984 essay on the "Inner Scorecard"): "Look for a manager who would never sell a single share of their company's stock to fund a 'lifestyle.' Look for someone who has the inner-scorecard rather than the outer one. Look for someone whose capital allocation has compounded over decades."
Quantitative tests:
- Share-buyback record: did the CEO buy back shares at fair prices, or at peak prices?
- M&A track record: do acquisitions create or destroy value?
- Compensation structure: is there a clear alignment between management pay and per-share business value?
- Letters to shareholders: are they candid, specific, and self-critical?
On the radar chart: shown as the "Management" axis. The metrics here are partly qualitative - our scorer pairs quantitative signals (buyback record, M&A track record) with parsed signals from earnings transcripts.
Pillar 4: Valuation
What it measures: Whether the current price is reasonable relative to the cash the business actually generates.
Buffett's framing (1986 letter on owner earnings): "If we measure the value of any business as the present value of the cash that can be distributed during the remaining life of the business... we naturally tend to focus on owner-earnings yield rather than the headline P/E."
Quantitative test: Owner-earnings yield ≥ 5% absolute for stable businesses, higher for cyclical/risky. The owner-earnings formula and full Apple walkthrough is in our owner-earnings explainer.
The 10-year Treasury anchor: Buffett's 2025 letter (the most recent) explicitly invoked the 10-year Treasury yield (~4.5% at time of writing) as the discount-rate floor. Owner-earnings yield must comfortably exceed the risk-free rate.
On the radar chart: shown as the "Valuation" axis. The lower the owner-earnings yield, the lower the score. This pillar fails first on most high-quality compounders - that's why even Apple sometimes scores "Partial Fit" on valuation.
Pillar 5: Financial Health
What it measures: Can the business survive bad years? How leveraged is it?
Buffett's framing (1989 letter, and consistently since): "I don't worry about a business with no debt. I worry a lot about a business with too much debt. There's no fixed level of debt that's acceptable - but the business has to be able to comfortably service it under conditions worse than today's."
Quantitative tests:
- Current ratio ≥ 2 (current assets / current liabilities)
- Debt-to-equity moderate (varies by industry, but generally < 0.5 for non-financials)
- Interest-coverage ratio ≥ 5x
- Free-cash-flow positive for 5+ consecutive years
On the radar chart: shown as the "Health" axis. A weak score here is the warning that should override a strong score elsewhere - a great business with a fragile balance sheet can fail in a recession.
How to read the radar chart on a stock page
Open /buffett/aapl/ (or any ticker) on invest-like. The PillarRadar component renders the five pillars as a polar chart with the score on each axis. The baseline is set at 75 - the level a Buffett-quality compounder should clear on every axis.
What to look for:
- A balanced pentagon at or above the 75-line: a textbook 7-of-7 framework consensus stock. Rare but real (Visa, Mastercard, Moody's, American Express, Microsoft).
- High on 1-3, low on 4 (valuation): a wonderful business at unfair price. Buffett would wait; Munger might already be in.
- High on 1-2, low on 3 (management): a great business with capital-allocation concerns. Common in founder-led tech companies.
- High on 4 (valuation) alone: a value trap risk. Read the moat and durability pillars before considering.
- Low on 5 (health): the dealbreaker. Even if everything else is high, weak balance sheet eliminates the position.
How invest-like uses the 5 pillars
Every public stock in the universe has all five pillars scored quarterly. The methodology is at /methodology/buffett-fit/ - every pillar's underlying metric is defined with source citations.
The Buffett Brain verdict (A+ to D letter grade) is a weighted combination of the five pillars, where the weights are derived from Buffett's published priorities (moat ≈ 25%, durability ≈ 20%, management ≈ 15%, valuation ≈ 25%, health ≈ 15%).
When you read a Buffett Brain verdict, the underlying breakdown by pillar is visible. The same data populates the radar chart. The same pillar scores feed our 7-framework consensus screen.
The 5 pillars in your own analysis
If you want to apply this framework yourself on any stock:
- Pull ROIC and check 10-year stability → Moat score
- Pull gross margin history → Durability score
- Read the last 5 years of shareholder letters → Management score
- Compute owner-earnings yield → Valuation score
- Pull current ratio, debt-to-equity, FCF history → Health score
Then ask: does this pass all five at threshold? If yes, it's a Buffett pick. If no, where does it fail, and is the failure structural or temporary?
For the quick version: open the stock's page on invest-like. The five pillars are computed and visualised in 1 second.
Disclosure
Educational tool. The 5-pillar framework is derived from Warren Buffett's published shareholder letters from 1977 to 2025. The interpretation is the author's; for the original sources, read the letters directly at berkshirehathaway.com.
Past framework scores do not predict future returns. The framework is reproducible from public data; verifying it manually is encouraged.
Author: Zaid Ghazal, founder of invest-like, indie SaaS, Kiel, Germany.