Across venues from Polymarket to Kalshi, Democratic wins were correctly priced, though several individual races broke against market consensus.
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Election betting hit record scale in the US midterms, even as some venues reported slower growth than the 2024 cycle.
The midterms served as the biggest test yet of whether prediction markets forecast elections better than polls.
Kalshi reported roughly $2.5B in midterm election trading, underscoring the venue's growing role in US political betting.
Markets converged on a Democratic sweep of Congress through Election Day, a call that ultimately held.
Equities and options positioning reflected investor expectations that split control in Washington reduces the odds of major policy shifts.
Nebraska becomes the latest state to turn down online sports betting at the ballot, leaving legalization hopes to future elections.
Market pricing moved Colom to favorite against incumbent Hyde-Smith, a shift that would be a major Deep South upset.
El-Sayed's market position held as results came in, with bettors favoring him over Republican Mike Rogers.
Regulators and prosecutors cautioned that betting on elections remains illegal in many states even as platforms expand.
Ballot outcomes in two large states could open new sports betting markets, a focus for operators like FanDuel.
Silver compared his FLIPR forecast with market pricing, highlighting persistent gaps between model and market views.
Polymarket handled a record share of midterm election volume amid continued US regulatory scrutiny.
Late market movement signaled a competitive Indiana House contest that polling had not highlighted.
The advocacy group argued market pricing missed key races, pushing back on claims of superior forecasting.
Post-election market movement reshuffled 2028 presidential nomination pricing.
Market pricing diverged from polling in Texas, one of several states where the two signals conflicted.
A surprise market shift put the Democrat ahead in a state long held by Republicans.
Traders concentrated volume on which party would control the House and Senate.
One of several races where the outcome diverged from market-implied probabilities.
Two Virginia localities voted down parimutuel betting, another mixed signal for gambling expansion at the ballot box.
Reuters profiled traders wagering meaningful sums on election outcomes.
Late market movement signaled a tightening Los Angeles mayoral contest.
Market odds pointed to a lopsided Nevada gubernatorial contest.
The piece considered the procedural and political obstacles to impeachment under a Democratic Congress.
Market pricing collapsed for the Trump-endorsed candidate as results came in.
Market odds moved sharply in the contest for Pelosi's San Francisco seat.
Kalshi and Polymarket prices showed no clear favorite in Alaska's Senate contest.
Silver's model published final House and Senate forecasts ahead of Election Day results.
Odds narrowed in a competitive North Carolina House district.
Indiana bettors concentrated money on Bayh over the course of Election Day.
Local sentiment was wary even as prediction market firms headquarter in New York.
Local Virginia congressional contests attracted notable prediction market interest.
Nebraska Republicans won the state's top contests even as voters rejected online sports betting.
Outlets published polling dashboards and forecasts as voters headed to the polls.