Sal Stewart win NL Rookie of the Year priced at 80% on Kalshi, on $797K traded

Sal Stewart’s contract to win NL Rookie of the Year was priced at 80% on Kalshi, with $797K traded, according to PredictionBubbles’ Oct 16, 2026 update. Its movers board showed a gain of 4 probability points over the preceding 24 hours.

The contract had not appeared in any earlier edition that day. That marks a new appearance in the coverage, not evidence that the contract itself had just opened.

How the move is measured

According to PredictionBubbles, its movers board compares prices from Kalshi and Polymarket over a 24-hour window and updates every 15 minutes. The supplied source snapshot records venue data read on 16 Oct 2026, 21:12 UTC.

The board ranks changes by their absolute size in probability points, rather than relative percentage gains. Trading volume provides context but does not determine placement. Its coverage spans 1,994 markets lasting longer than 14 days, excluding same-week fixtures; only open contracts with a valid day-earlier comparison qualify.

What the figures establish

Stewart’s higher price shows a shift in traders’ assessment of the award outcome. The supplied material does not identify a specific development behind that shift, provide competing candidates’ prices or establish the contract’s order-book depth. The $797K traded figure therefore should not be treated as a measure of immediately available liquidity.

What it means for prediction markets

• Price and movement tell different stories: 80% is the quoted market-implied probability; the 4-point gain describes how that assessment changed over 24 hours.
• Volume is context, not an explanation: $797K traded does not establish what caused the repricing or how much trading drove the latest move.
• Coverage is not contract age: Absence from earlier editions that day does not mean the market was newly launched.
• The outcome remains unsettled: A higher contract price reflects traders’ positioning, not confirmation that Stewart will win.