The Spin Index — How We Measure Spin

What it is

The Spin Index is a 0–100 gauge of how much spin is in the wider coverage of a story — what you'd meet reading, watching, or listening almost anywhere else. It rides on every Top 10 and Below the Fold story, in four plain-language bands:

Clear (0–24). The coverage out there is mostly straight.
Hazy (25–49). Some angle in the air; read with a light filter.
Heavy Spin (50–74). Most outlets are pushing a frame; filter before you share.
Spin Storm (75–100). The loudest coverage is the least reliable; trust the record, not the noise.

It is a reading on the weather outside — the ambient spin you'd walk into elsewhere. Inside the brief, we've already filtered it out. That's why each Unspun Story shows the drop we made: NN → ~0.

Why we can measure it — because we remove it

Most "bias meters" score from the outside, guessing at slant. Ours is different, and the difference is the whole point: the Spin Index is a byproduct of the work of unspinning the story.

To produce each Unspun Story, we do the slow work no headline does — we inventory every framing each side brings to a contested event, we strip the loaded language and scare-quotes, we mark what's genuinely disputed versus merely uncertain, and we correct the tilts that creep into how a story is set up. The Spin Index is simply the measure of what we had to clean. You can't fake it from the outside; you can only know how much spin a story carried if you're the one who removed it.

What goes into the number

The score is built from things we count while we unspin — not opinions we add afterward:

Framings. How many distinct frames the wider coverage brings to the story.
Language heat. The loaded words, scare-quotes, and one-sided constructions we neutralize.
Fact vs. framing. Whether the real dispute is about facts, or only about how the story is framed.
Tilts corrected. The setup slants we had to straighten before the story met our standards.

We publish these categories. We do not publish the weights that combine them — that calibration is the proprietary part, refined on real data over time.

The symmetry guarantee

Every input is lean-blind. The rules that count heat, framings, and tilts don't know — and don't care — which side a story leans. A story spun hard from the left and a story spun hard from the right, carrying the same fog, score the same.

So the Spin Index is never a verdict on who's right, and it is never a score of an outlet. It rates the coverage climate around a single story — symmetrically — and nothing else. It's a measure of noise, not of politics.

Honest about where it is

The Spin Index is live and improving. The current version orders stories reliably — the most-spun stories separate cleanly from the calm ones — while we lock the exact band cutoffs against a longer, calmer stretch of real data before we call it final. We'd rather tell you that than pretend a young measure is finished.