The Gap #3: the book and the crowd disagree on Ecuador vs Curacao

Polymarket and the books disagree most sharply on Ecuador, the Netherlands, and Morocco — here is where the gaps are real and where they are not.

The football

The widest gap in this week's data sits on Ecuador to beat Curacao on 21 June. Polymarket traders price Ecuador's win probability at 87.2%, but Cloudbet's vig-stripped implied probability is only 78.8% — an 8.4-percentage-point gap. In money terms, the crowd's fair price for Ecuador is 1.15, yet Cloudbet is paying 1.16. That is tight decimal territory where fractions matter, and while the book price is barely above fair value, the directional signal from the market is unusually strong for a group-stage mismatch. Ecuador are not being overestimated by punters; they are being underestimated by the book.

The Netherlands against Tunisia on 25 June is the second-largest gap at 7.7pp. Polymarket puts the Dutch at 70.9% to win; Cloudbet's stripped number is 63.2%. The crowd fair price is 1.41 and you can get 1.45 at Cloudbet — a four-cent gap on a favourite that the market considers meaningfully shorter than the book does. Scotland versus Morocco on 19 June shows a similar 7.6pp gap, with Morocco at 55.4% on Polymarket against 47.9% implied at Cloudbet. The crowd fair price is 1.80 and the available price is 1.93, which is genuine breathing room on what is closer to a pick-em than the book is treating it.

Japan to beat Tunisia on 21 June rounds out the top cluster at 7.1pp. Polymarket has Japan at 63.1%, Cloudbet implied at 56.1%. Fair price 1.58, book price 1.64 — another case where the gap is consistent and the direction is clear. USA to beat Türkiye (5.6pp, 2.55 at Cloudbet against a fair price of 2.40) is the last market we would call actionable, though the gap is smaller and the fixture is a genuine contest with variance in both directions.

The skips

Several markets look interesting on first glance but do not hold up. Ivory Coast to beat Curacao shows a 4.9pp raw gap, but the crowd fair price is 1.21 and the book is at 1.18 — the book is actually shorter than fair value, so there is no edge in that direction regardless of what the percentage gap says. Bosnia versus Qatar (4.9pp) and Türkiye versus Paraguay (4.0pp) have gaps that shrink once you look at fair price versus book price alignment. Argentina to beat Austria (3.4pp) and Algeria to beat Jordan (2.5pp) both fall below the threshold we require to call anything actionable. Spain to beat Saudi Arabia at 2.7pp has the same problem in reverse as the Ivory Coast line: the book price of 1.10 is lower than the crowd fair price of 1.13, meaning the book is not offering value in the direction the gap appears to suggest.

Odds move from the moment we capture them to the moment you click, so the price at the book is the only price that counts.