Trading volume in political betting markets has set a new record. Kalshi posted more than $2.5 billion in trading volume across 2026 US midterm election contracts, surging over 92% compared to the $1.3 billion volume recorded in the 2024 election.
This surge in capital unfolded across a different political landscape. While the 2024 election featured a presidential race that typically commands the greatest attention and capital, the 2026 midterms centered on races for the House, Senate, and governorships. The absence of a presidential contest did not deter capital turnover on the political contract exchange.
Out of 487 Races, Only Eight Favorites Lost
The high trading volume was matched by the market’s forecasting accuracy. Kalshi reported that market favorites won 479 out of 487 races called by 6:00 a.m. ET on November 4. This yielded an aggregate accuracy rate of approximately 98.4%, rounded to 98%.
A breakdown of the results shows market favorites dominating across nearly all levels. In House races, favored candidates won 356 out of 360 seats. At the Senate level, market projections were accurate in 32 of 33 races. Meanwhile, in gubernatorial elections, 33 of 34 favored candidates secured victory. Across all tallies, only eight exchange favorites failed to win their seats.
Democrats’ Odds Crossed 99% on Election Night
Political certainty coalesced relatively quickly on election night. Kalshi’s contract tracking House control reached a 99% probability of a Democratic victory by 8:10 p.m. ET. By 9:00 p.m. ET, the probability of Democratic control of the Senate had also crossed the 99% mark.
An analysis by Kalshi Research noted that market accuracy sharpened as poll closures neared. Over the three-month period leading up to the close of voting, directional accuracy climbed from 93.8% to 98.2%. During the same timeframe, the Brier score (a statistical indicator measuring probability deviation against actual outcomes) improved from 0.040 to 0.016.
CFTC Oversight and New Rules in Congress
The US Commodity Futures Trading Commission (CFTC) responded to the multi-billion-dollar turnover by tightening oversight of contract trading integrity on Kalshi to monitor orderly political transactions.
Regulatory pressure also mounted from Capitol Hill. Representative Don Davis introduced the “No Betting on Your Own Race Act,” a bill seeking to prohibit candidates from betting on their own elections.
For financial market participants and voters alike, the 2026 midterms demonstrated that prediction markets can forecast hundreds of races with high accuracy. However, as election betting grows into a multi-billion-dollar industry, regulators and lawmakers are stepping in to ensure ethical boundaries are not crossed by candidates competing in them.
Sourced from crypto.news.
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Disclaimer: This article is for informational and educational purposes only, not financial advice. Cryptocurrency assets are highly volatile and carry significant risk. Always do your own research (DYOR) and never invest more than you can afford to lose.
