Kalshi, Polymarket and other venues largely called a Democratic sweep of Congress before TV networks, giving the industry its biggest credibility test yet.
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Record wagering on the 2026 midterms marks prediction markets' arrival as a mass-market venue despite regulatory uncertainty.
Investors bet a split Washington means fewer policy shocks, sending equities higher after Democrats' win.
The failed ballot measures leave Nebraska among the shrinking group of states without legal mobile sports wagering.
The appellate refusal leaves Kalshi's fight over state-level election betting in Nevada without further federal review at this stage.
The figure underscores how election contracts have become a core volume driver for the platform.
The Michigan result matched prediction-market pricing that had favored the Democratic candidate in the closing days.
Traders priced a possible Democratic upset in deep-red Mississippi as odds shifted overnight.
Lawmakers and state officials are weighing tighter rules as election betting volume hits records.
Down-ballot outcomes in Texas and Oklahoma could unlock new sports betting and THC legislation in the next session.
Critics argued the platforms' probabilities understated Democratic margins even as they called the overall outcome.
The midterms served as the industry's biggest head-to-head test against traditional polling and forecasters.
Industry analysts see the election altering the odds for sports betting and iGaming expansion across multiple states.
Markets priced near-certainty on a Democratic Congress as polls closed on Election Day.
Ossoff's win moved him to the front of early Democratic presidential nomination markets.
Ahead of voting, markets broadly priced a Democratic sweep of the House and Senate.
Traders boosted the Florida governor's odds for the 2028 Republican nomination as he warned of GOP losses.
The ruling keeps Wisconsin's prohibition on election wagering in effect while litigation continues.
The results bucked the national Democratic wave in one of the country's reddest states.
Local voters view Kalshi and Polymarket warily despite the platforms' New York headquarters.
The state's down-ballot contests saw heavy trading volume on election night.
The local results mark another setback for gambling expansion in the state.
Traders briefly priced a stunning Democratic upset in a state that has not elected a Democratic senator since the 1930s.
Local House contests attracted notable wagering even outside the marquee Senate races.
Prediction markets favored the Democratic candidate in one of the cycle's most-watched Senate races.
Betting markets pointed to a decisive outcome in the Nevada gubernatorial contest.
One of the state's most competitive House contests drew close market pricing.
Institutional investors are eyeing more complex prediction market products as tools for hedging beyond yes/no contracts.
The open-seat contest drew late wagering as polling closed.
Pre-election Bloomberg analysis found volume growth cooling compared with the prior presidential cycle, though it later surged.