St. Louis City SC win the 2026 MLS Cup priced at 10.1% on Polymarket, up 2.7 points, on $107K traded

St. Louis contract moves higher

The Polymarket contract on St. Louis City SC winning the 2026 MLS Cup was priced at 10.1%, up 2.7 probability points over 24 hours, with $107K traded, according to the supplied market update published Oct 17, 2026 · 4:24 PM ET.

PredictionBubbles’ movers board identified the contract among the day’s upward moves in sports. The supplied material does not identify a match result, team announcement or other development behind the repricing.

How the move is measured

According to PredictionBubbles, the board compares prices from Polymarket and Kalshi over a 24-hour window and updates every 15 minutes. The supplied snapshot records venue data collected on 17 Oct 2026, 20:11 UTC.

The board ranks changes by their size in probability points, rather than relative percentage gains. Trading volume and liquidity provide context but do not affect the ranking, so the St. Louis contract’s 2.7-point increase and its $107K traded measure different aspects of market activity.

PredictionBubbles says its ranking covers 2,006 markets with lifespans longer than 14 days, excluding same-week fixtures. Only open contracts with a valid day-earlier comparison qualify; the supplied table displays the top 150 of 401 markets that moved at least one probability point.

What it means for prediction markets

• The price signals a higher market estimate, not a confirmed sporting development. The 10.1% reading reflects how the contract was priced at the reported snapshot.
• The increase is 2.7 probability points, not 2.7%. That distinction matters when comparing moves across contracts with different starting prices.
• Volume does not establish market depth. The $107K traded offers activity context, but the supplied material does not establish liquidity or explain what drove the move.