About Buy Like Buffett
Buy Like Buffett is an independent educational research product built around the Moat Index. It turns primary SEC filings into versioned model outputs, preserves the history of what each model said at the time, and publishes the evidence, limits, and research needed to inspect those outputs.
Buffett’s “wonderful business at a fair price” idea is the teaching frame, not a claim that a formula can reproduce his judgment. Scores are computed from disclosed filing data under published rules; they are not analyst ratings, predictions, or recommendations.
What the product includes
- The Moat Index and Screener: a ranked operating-company leaderboard and filters across the full currently scored universe.
- Company pages: the current filing-derived score, its inputs and valuation context, append-only score history, and a point-in-time Track Record when the historical data supports one.
- Berkshire’s portfolio, scored: the latest public 13F joined to the appropriate operating or financial-sector model, with the two score scales kept separate.
- Research, including the point-in-time backtest: historical cohorts reconstructed only from filings available at each cutoff, with later returns joined separately.
- The Paper Moat Portfolio: a hypothetical, rules-only portfolio with a live record marked nightly and kept append-only from launch, plus a separately labeled historical backtest.
- Score My Portfolio: a browser-local tool that weight-averages covered operating-company scores, always alongside the share of the portfolio that average actually covers.
- The Glossary, Methodology, Playbook, and guides: the definitions, model limits, investing principles, and primary-source context behind the data product.
What the models cover
Coverage includes operating companies whose annual SEC filings provide enough comparable inputs for the relevant model; missing inputs remain unscored rather than guessed.
Operating companies use the Moat Score. Covered banks and insurers are scored under a separate financial-sector model with its own components and calibration; financial-sector scores are never ranked, averaged, or described as comparable with the operating Moat Score. The operating model discloses and renormalizes exactly one genuine component abstention; two or more are shown as insufficient data. Neither model fills missing filing inputs with a guessed score.
What we deliberately don't do
We do not publish stock picks, personal recommendations, or analyst price targets. The Paper Moat Portfolio is a hypothetical demonstration of a disclosed rule, not a real-money fund or a portfolio to copy. We are not investment advisers, and nothing on this site is investment, legal, or tax advice. We are not affiliated with, or endorsed by, Warren Buffett, Berkshire Hathaway, or any of their businesses.
Editorial rules
Company data begins with primary SEC filings. Product totals and result counts are computed from the live data when they can be proved, and omitted when they cannot. Missing inputs stay missing; service failures are labeled as unavailable; operating and financial-sector scores never share a ranking or average. Claims about Buffett’s views cite the primary record, and hypothetical or backtested results are labeled separately from live records.
Questions or corrections are welcome at galen@buylikebuffett.com.