While results are pouring in and votes are being counted, a blue wave is being revealed. Election and polling markets have been quite active this season, since people have been betting on which candidates will win their races, and which party will take control of the Senate and House of Representatives.
A question arises: What was more accurate, polls or markets?
Democrats won control over the House and Senate. Polymarket betting probabilities predicted that Democrats would win 210 seats in the House and 45 seats in the Senate.
According to Action Network betting markets like Kalshi and Polymarket, there was a 92% and 93% favor of democrats winning the House. For Senate control, the odds were 68% to have a Democratic majority. Decision Desk HQ, a private U.S. election data and prediction calling organization, put the chances of Democrats winning at 80% of winning the House.
DDHQ measures the probability of each political party’s chance to win by many factors such as polling, fundraising, political trends, and prediction of market data. This makes the two sources somewhat dependent on each other.
They predicted the Senate would have a 60% chance of being won over by Democrats.
While every major source favored Democrats, betting markets were more confident in their win.
Why did political polls differ from betting markets?
Polls reflect where voter support stands, while prediction markets may use a lot more factors to determine who would win, like fundraising, past election results and states voting history.
The president’s party has lost an average of 27 House seats from 1934 through 2022, according to the American Presidency Project.
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