Why BAI8 keeps the chance fixed when the price moves
Our published chance stays fixed when the bookmaker price moves. Why we freeze it, how the edge changes, and the limit of that choice.
On this page
When we publish a Desk call, the chance sticks. The bookmaker's price does not. That is a deliberate product choice, and it confuses people when a weekend hub shows Halifax shortening from 4.40 to 3.70 while our 39.9% stays put. This page is the reason.
The snapshot rule
A BAI8 chance is the output of research passes, source grades and a fitted model at a point in time. Once that number is on the public card, it is a record of what we thought then. Updating it every time a price ticks, or every time a doubtful player trains, would turn the card into a live tip sheet. That is not what we sell.
We either run a full reassessment or we leave the snapshot alone. Public cards on this blog are the snapshot. For the full pipeline, see how BAI8 prices a fixture.
What still moves: the edge
Edge is not frozen. Edge is our chance minus the chance implied by the best price we are quoting.
| Our chance | Price | Implied chance | Edge |
|---|---|---|---|
| 39.9% | 4.40 | 22.7% | +17.2 pts |
| 39.9% | 3.70 | 27.0% | +12.9 pts |
| 39.9% | 2.51 (fair) | 39.9% | 0 pts |
Same chance, three prices, three edges. When we say a price has shortened since publication, we are telling you the offered edge has shrunk, not that we changed our mind overnight. More on that framing in what a positive edge actually means and fair price vs best price.
A live example from this morning
Crewe Alexandra to beat AFC Wimbledon was logged at 2.85 on 2 November and at 2.55 this morning. Our chance stayed 47.2%. The edge fell from about 12 points to 8. The research did not secretly flip to Wimbledon. The market moved closer to our fair 2.12.
The same pattern shows up on Zwolle at Willem II (2.45 down to 2.38) and on several other public cards. We report the new best price. We do not rewrite history.
The weakness of the rule
Freezing the chance has a cost. If a star striker is ruled out three hours after publication, our public number is stale relative to that news. We can write an analysis note beside it, as we did with Volos without Burnić and Furtado, but the card's chance field stays. Readers who want a fresh number need a new assessment, not a silent edit.
That is a real weakness. We would rather show a dated snapshot than pretend a half-updated chance is still the original research.
What this does not tell you
It does not say prices are wrong when they move. Sometimes the market knows something we have not reassessed. It does not promise a reassessment on every injury. It explains why the chance column on a BAI8 card is boring on purpose.
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Common questions
Does BAI8's chance change when the odds move?
No. The published chance is the research snapshot at assessment time. Later price moves change the edge, not the chance.
Why not update the chance with new team news?
Because a moving chance without a full re-research would be a different product. We either reassess properly or leave the snapshot alone. Public cards stay frozen.
What happens to the edge when a price shortens?
Edge is our chance minus the chance the price implies. If the price shortens toward our fair price, the edge shrinks. If it drifts away, the edge grows.
Can members see a fresh assessment?
Members can commission research. The public Desk card you see on the blog is still the published snapshot with its original chance.