How Proofstock works

Every stock gets a rating from Strong Bullish to Strong Bearish, based purely on where it lands versus the whole universe across six factors: momentum, quality, value, growth, size, and low volatility. A rating is a description of a stock’s factor profile today — not a prediction, and not a recommendation to do anything.

Every rating is shown in three layers, so you can go as deep as you want and no further:

1. 1
   Glance — colors

   Small dots and bars give a stock’s factor signature at a glance: green means strong on that factor, gray is neutral, red is weak. A half-second read.

2. 2
   Plain English — a sentence

   One line in words, e.g. “Strong momentum and quality, weaker value.” You never need to touch a number to use the site.

3. 3
   The numbers — on demand

   Click Show technical detail on any stock to see the raw z-scores (how many standard deviations from the sector median). That’s the “proof” in Proofstock — nothing is hidden.

• Transparent by construction. Every rating is reproducible from the published methodology. No black box, no discretionary overrides, no hand-picking.
• Sector-neutral. A tech stock is judged against tech, an energy company against energy — so the model doesn’t just declare whole sectors good or bad.
• A verifiable track record. The daily hash chain means the published history can’t be quietly rewritten. The proof is public.
• Plain-English first. You don’t need to be a quant. The words come first; the math is there when you want it.

The core ratings stay free. Two paid plans add delivery, automation, and programmatic access:

Like everything on Proofstock, these are research — a summary of what the model rated, not advice about what to buy or sell. You decide what to do with it.