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The Moat Index Companies A–Z Sectors Berkshire’s Portfolio Moat Movers

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Applied Optoelectronics, Inc.AAOI No moat

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The Moat Index · Filing-derived evidence, kept in history.

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An independent educational research product built around the Moat Index: filing-derived scores, company Track Records, screening, as-of backtests, a rules-only paper portfolio, and portfolio tools. Scores are computed model outputs, not analyst ratings. Nothing here is investment, legal, or tax advice, and we are not affiliated with Warren Buffett or Berkshire Hathaway.

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The Moat Index All Companies A–Z Sectors Screener Preset Screens Berkshire’s Portfolio Moat Movers Quality on Sale Analyzer Compare Score My Portfolio Paper Moat Portfolio Watchlist

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Research As-of Backtest Methodology Glossary The Playbook Guides & Archive Resources

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