Arthur Fils wins priced at 40.0% on Kalshi, down 27.0 points, on $823K traded

Arthur Fils’ win contract on Kalshi was priced at 40.0%, down 27.0 probability points, with $823K traded, according to PredictionBubbles’ movers listing. The summary’s Oct. 29, 15:54 UTC crawl placed the contract among the board’s largest downward moves, within its sports category.

A sharp move, with limited event detail

The decline represents a change in market-implied probability over 24 hours, not a relative percentage loss. PredictionBubbles ranks contracts by the size of that probability-point change; trading volume provides context but does not determine their position.

The supplied material does not identify Fils’ opponent, the competition, the contract’s settlement terms or a catalyst for the decline. It therefore establishes a substantial repricing without explaining what prompted traders to reassess the outcome.

How the board measures movement

According to PredictionBubbles, the supplied page snapshot drew venue prices at 29 Oct 2026, 15:41 UTC, earlier than the crawl cited in the summary. The service refreshes every 15 minutes using prices from Polymarket and Kalshi, making the timestamps important when interpreting a changing market.

The board describes a universe of 1,991 markets lasting longer than 14 days, excluding same-week fixtures to keep rapid settlement-driven swings from dominating its rankings. Only open contracts with a valid 24-hour comparison qualify. In the supplied snapshot, its table displayed the top 150 of 492 markets that had moved at least one probability point.

What it means for prediction markets

• Magnitude and activity are separate signals. The 27.0-point decline measures the repricing; the $823K traded adds activity context without establishing order-book depth.
• The cause remains unverified. The supplied information does not connect the move to a match development, announcement or other specific event.
• The ranking has limits. It reflects PredictionBubbles’ eligible market universe, rather than every sports contract available on either venue.
• The price is a snapshot, not an outcome. The 40.0% reading captures traders’ pricing at the reported observation, not confirmation of how the contract will settle.