Elise Mertens wins priced at 21.0% on Kalshi, down 31.0 points, on $1.1M traded

The Kalshi contract for Elise Mertens to win was priced at 21.0%, down 31.0 probability points, with $1.1M traded, according to the supplied market update published Oct 29, 2026 at 1:24 AM ET. PredictionBubbles’ movers board placed the contract among its largest downward moves in sports.

A sharp repricing, with limited event detail

The decline measures a change in market-implied probability, not a relative percentage loss. According to PredictionBubbles, its movers rankings compare venue prices over 24 hours and order contracts by the size of their probability-point changes.

The supplied material does not identify the competition, opponent or settlement conditions for the Mertens contract. It also provides no reporting explaining the decline, limiting what can be concluded about the event behind the repricing.

How the board measures movement

According to PredictionBubbles, the board draws prices from Kalshi and Polymarket and refreshes every 15 minutes. The supplied page records a venue-data snapshot of 29 Oct 2026, 05:48 UTC—later than the supplied market update’s publication time—so those timestamps should not be treated as a single observation.

The board’s universe covers 2,026 markets lasting longer than 14 days and excludes same-week fixtures. Only open contracts with a valid 24-hour comparison qualify for the rankings; trading volume and liquidity provide context but do not determine position.

What it means for prediction markets

• The signal is the repricing: The 31.0-point decline shows a substantial shift in the price assigned to a Mertens win, not proof of the eventual result.
• Volume is a separate measure: The reported $1.1M traded adds activity context, but does not establish order-book depth or explain the move.
• Contract details remain essential: Without the event and settlement terms, the 21.0% price cannot be tied confidently to a specific sporting outcome.