Dayana Yastremska wins priced at 68.0% on Kalshi, up 26.0 points, on $2.1M traded

Dayana Yastremska’s win contract on Kalshi was priced at 68.0%, up 26.0 probability points, with $2.1M traded, in the update published Oct 27, 2026, at 5:09 AM ET. According to PredictionBubbles, the contract appeared among the largest upward moves in its sports category.

The figures show a substantial shift in pricing, but the supplied material does not identify the match, opponent or catalyst. It also does not specify the period covered by the contract’s $2.1M trading figure.

How the move is measured

According to PredictionBubbles, its movers board compares market-implied probabilities over 24 hours, using prices from Kalshi and Polymarket. The supplied snapshot records venue data read on 27 Oct 2026, at 08:43 UTC; the board refreshes every 15 minutes.

Rankings depend on the size of the probability-point change, not relative percentage growth or trading volume. Yastremska’s 26.0-point rise therefore describes the change in the contract’s implied probability—not a 26.0% relative increase.

Limits of the comparison

The board’s stated universe covers 2,049 markets lasting longer than 14 days and excludes same-week fixtures. According to PredictionBubbles, that filter is intended to keep rapid price changes associated with imminent settlement from dominating the rankings. Only open contracts with a valid 24-hour comparison qualify.

Volume provides context but does not affect a market’s rank. The $2.1M figure is therefore separate from the size of Yastremska’s move, and the supplied material offers no order-book depth or explanation of what prompted the repricing.

What it means for prediction markets

• Price is not confirmation: The 68.0% reading reflects the contract’s market-implied probability, not an established sporting outcome.
• Movement and activity are distinct: The 26.0-point increase measures repricing; $2.1M traded measures activity, with its reporting period unspecified here.
• Contract details remain important: Without the match identity, settlement terms or a documented catalyst, the move alone cannot explain why traders changed their assessment.