Prediction Markets Forecast Democratic Wins

Prediction markets successfully predicted Democratic wins in the US midterm elections despite underestimating several candidates. Platforms like Kalshi and Polymarket saw billions in trades.

FILE PHOTO: US Senate Democratic candidate Annie Andrews speaks to supporters during a campaign stop in North Augusta, South Carolina, US, October 30, 2026. REUTERS/Sam Wolfe/File Photo

Prediction markets correctly signaled a Democratic sweep in the United States midterm elections, with total trading volume on Kalshi reaching $2.5 billion. The results tested whether decentralized odds could accurately forecast electoral outcomes across thousands of contested races. Voters delivered a stinging rebuke to the administration, driving upsets that defied initial market probabilities.