THREE VERDICTS ON FRAMEWORK FIT
Gemstone.
Geode.
Sediment.
RockTurners is an AI stock screener grounded in SEC filings. Every company a strategy evaluates lands in one of three tiers — a verdict on fit to a published framework, never an action to take. The evidence behind each verdict is cited to the filing.
FIVE LENSES · THIRTEEN STRATEGIES
Published frameworks, applied identically
Each strategy is a fixed screen plus a fixed evaluation prompt, in the tradition of published value- and growth-investing research. Every subscriber who runs a strategy gets output from the identical criteria.
| Lens | Focus | Built-in strategies |
|---|---|---|
| 01 · VALUE | Cheapness with a margin of safetyFrom statistical net-nets to durable-moat franchises priced below their worth. |
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| 02 · GROWTH | Growth priced with disciplineClassification before comparison, PEG discipline, and the leaders proving it in the numbers. |
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| 03 · QUALITY | Durable returns on capitalROIC persistence, moat evidence, and fifteen-point qualitative depth read from the filings. |
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| 04 · INCOME | Payout streaks that can continueDividend growth streaks with the coverage and balance sheet to keep compounding them. |
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| 05 · EVENT & SIGNAL | Events the filings discloseCorporate events and insider behavior that published research treats as informative. |
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Strategy names describe the method. Practitioner names appear only as "in the tradition of" attribution on each strategy page. Browse all five lenses →
HOW IT WORKS
Two stages, from universe to verdict
Filter the universe
Each strategy's fixed quantitative filters run against the SEC EDGAR operating universe — ~4,000 U.S.-listed operating companies. Near-miss rationales are kept, so you can see why a company dropped out.
Read the filings
Survivors go to the strategy's AI evaluator, which reads targeted EDGAR sections and returns a Gemstone / Geode / Sediment verdict — every claim cited to its filing section.
Check the evidence
Every verdict opens to scored dimensions, trap signals with their sources, and what couldn't be verified — flagged as unknowns, not papered over.
ANATOMY OF A VERDICT
Every claim carries its source
A verdict is not a number — it's a structured read of the filings. Every one carries the same four parts:
Sample Company's rank is supported by recurring operating earnings and current financial filings. The 10-K filed March 3, 2026 (within the 14-month window) shows net income from continuing operations of $412.8 million for FY2025, with stable, recurring operating performance across its two reporting segments. Operating expenses grew proportionally at 4.1%, with no material one-time items identified in the provided MD&A or financial notes. The data integrity, earnings recurrence, and accounting quality scores all meet or exceed the minimum threshold of 3, with no disqualifiers triggered.
WHAT IT IS · WHAT IT ISN'T