Luca Van Assche wins priced at 99.0% on Kalshi

A Kalshi contract on Luca Van Assche winning reached a market-implied probability of 99.0%, up 37 percentage points over 24 hours, according to predictionbubbles.net. The Oct 20, 2026 · 3:24 PM ET snapshot identified it as the biggest upward sports move, with $703K traded.

A sharp move toward certainty

The price reflects traders’ assessment of the outcome, not confirmation of a result. The supplied material does not identify Van Assche’s opponent, the competition, the match status or the contract’s resolution deadline. It also provides no explanation for the increase.

PredictionBubbles notes that sports contracts can respond to lineups, injuries, form and changes in the score. Those are general drivers of repricing, however; the material does not establish which, if any, drove this move.

Movement and volume measure different things

The site ranks probability changes by their absolute movement over the preceding 24 hours, while its volume rankings use total trading activity. The $703K figure therefore represents reported total traded volume, not necessarily money traded during the period in which the probability rose.

According to predictionbubbles.net, its sports coverage includes 606 open markets, comprising 240 on Kalshi and 366 on Polymarket. Its embedded display features the 300 largest by volume, and its data refreshes every 15 minutes, even though trading on the exchanges continues between updates.

For context, the site names the contract asking whether Shakhtar Donetsk will win the 2026-27 UEFA Champions League Championship as its most-traded sports market at the latest refresh, with $33.0M traded on Polymarket. That volume distinction is separate from Van Assche’s leading upward probability move.

What it means for prediction markets

• Near-certainty is still a price: The 99.0% reading signals strong trader confidence, but does not establish that the outcome has occurred or the contract has settled.
• The catalyst remains unknown: Without match details or a price history, the supplied snapshot cannot explain the 37-point rise.
• Timing and terms matter: A 15-minute refresh cycle can lag exchange activity. PredictionBubbles also cautions that related contracts across venues may have different wording and resolution rules.