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Prediction markets win big on election night

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Cite

Angelo, J. (2026, November 4). Prediction markets win big on election night. Semafor. https://www.semafor.com/article/11/04/2026/prediction-markets-win-big-on-election-night

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Semafor · collected 2026-11-04 · by Jake Angelo

Quick Summary

Prediction markets like Kalshi and Polymarket accurately forecasted the Democratic sweep in the midterms, outperforming traditional polling methods on several key races but missing some surprises such as Texas Governor Abbott's defeat. Trading volume for down-ballot elections increased nearly fivefold from the 2024 cycle to this year’s midterms, reaching $1.8 billion according to Semafor analysis. Prediction market platforms are expanding their reach through partnerships with media outlets and aggressive advertising campaigns aimed at sports-betting audiences.
Written by AI on 2026-11-04, from this article's own text only (the story summary below draws on all the coverage).

AI analysis

Story summary

Prediction markets emerged as significant winners during the 2026 midterm elections, accurately forecasting key outcomes such as the Democratic sweep of Congress and several battleground races more precisely than most traditional polling models. However, they failed to predict surprises like Texas Gov. Greg Abbott's loss and unexpected Senate victories for Democrats in Iowa and South Carolina. Trading volume on down-ballot elections grew nearly fivefold from the 2024 cycle, reaching $1.8 billion this year. Despite their growing influence, sports and crypto bets still dominate both platforms compared to election contracts. Prediction market companies like Kalshi have been expanding their reach through partnerships with media outlets and aggressive advertising campaigns, including spots on Meta that rival super PAC spending.

Written for “Prediction Markets Win On Election Night” on 2026-11-04, grounded in this article and the 0 other(s) covering the same event.
Why this leaning score
This article does not take a side on a contested political question, so it has no leaning score. That is an answer rather than a gap: a match report or a rescue can be warmly or critically written without being left or right, and scoring it anyway is how approval of a subject gets recorded as a political position.
No political leaning scored for article 128864 · logged 2026-11-04

Story

📰 Prediction Markets Win On Election Night
Politics · 1 article(s) covering the same event.

Compared with similar articles

This article reads unscored and hedges 14% of its claims. Each row says how that neighbour differs.
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How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
7
sentences that state something as happening or true
Uncertain
14%
1 of 7 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
59/100
Semafor's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
1
Politics
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-11-04 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

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Running correction rate · 3 correction(s)
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Who wrote this

Jake Angelo
13 article(s) here · 0 carrying a prediction
🔮 The News Casino operators and sports betting companies have spent record amounts on campaign donations and on lobbying in Washington thus far this year, hoping it will help win back millions of bettors and gambling dollars that prediction markets have lured away.
2026-10-23 · assertive framing · Betting operators and prediction markets spent record amounts on campaign donations and lobbying
🔮 While AI fluency isn’t yet a prerequisite for movie making, some of the residency’s creatives are betting it soon will be.
2026-09-25 · assertive framing · Hollywood scouts film schools for AI-native talent
🔮 For the 70 million daily customers McDonald’s has, even a 90% accuracy rate would leave 7 million facing a potential error, making for a supersized customer service test.
2026-09-25 · assertive framing · McDonald's unveils AI-enabled drive-thru system
🔮 “Winter is coming,” Kristalina Georgieva, managing director of the International Monetary Fund said at Semafor’s Next 3 Billion event in New York, warning that prices will keep climbing.
2026-09-22 · assertive framing · 'Winter is coming': IMF head issues 'warning' over inflation and central bank tightening
🔮 An S&P Global assessment of data center companies globally found that just 15 of the 50 firms surveyed received a passing grade signaling that they would be low-carbon and climate-resilient by 2030.
2026-09-22 · assertive framing · ‘Hold us accountable’ on data centers, Amazon sustainability chief says
🔮 But Pika says their product stands out in part because it will be available at half the price of competitors’, including Seedance, a text-to-video generation model available across other AI video platforms.
2026-09-17 · assertive framing · Video AI company Pika offers new tool to speed up AI video creation
🔮 Edtech may have already failed to support learning, though.
2026-09-15 · assertive framing · Students perform better academically with less AI, study finds
🔮 These licensing agreements are not only a way to shift AI music companies from the targets of lawsuits (UMG, Sony and Warner sued Suno in 2024, but Warner dropped out late last year) to paying customers for music, but also a bet that allowing fans to play with the tech may demystify it, and could make some more people open to AI-assisted music down the line.
2026-09-12 · assertive framing · UMG and voice AI giant ElevenLabs launch AI-powered music platform
🔮 “They wanted to see if AI could help fill that gap at a cheaper price,” he said.
2026-09-04 · assertive framing · Filmmakers tout AI’s use in Hollywood at the other film festival in Venice
🔮 In a blog post Thursday, Nvidia CEO Jensen Huang said Hugging Face “will remain an open platform for the entire AI ecosystem.
2026-09-03 · assertive framing · Nvidia to buy Hugging Face for nearly $13 billion
Also by Jake Angelo
Betting operators and prediction markets spent record amounts on campaign donations and lobbying
2026-10-23 · Semafor
Hollywood scouts film schools for AI-native talent
2026-09-25 · Semafor
McDonald's unveils AI-enabled drive-thru system
2026-09-25 · Semafor
'Winter is coming': IMF head issues 'warning' over inflation and central bank tightening
2026-09-22 · Semafor
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 13 articles by Jake Angelo →

Topics

Congress Democratic Kalshi Polymarket Texas

Subjects

Kalshi ORG · 3× Democratic NORP · 2× Polymarket ORG · 2× Congress ORG · 1× Greg Abbott PERSON · 1× Iowa GPE · 1× Semafor ORG · 1× Senate ORG · 1× South Carolina GPE · 1× Texas GPE · 1×

Narrative

Kalshi and Polymarket correctly called the Democratic sweep of Congress by wider margins than most polling models, as well as key battleground races, though they missed surprises like Texas Gov. Greg Abbott’s loss and Democratic Senate victories in Iowa and South Carolina.
framing: assertive · carried by 1 article(s) · first seen 2026-11-04
2026-11-04 · Semafor
Prediction markets win big on election night · assertive framing

Claims (7 extracted, 1 hedged)

Prediction markets emerged as big winners of the midterms. asserted
markets → emerge → midterms
Kalshi and Polymarket correctly called the Democratic sweep of Congress by wider margins than most polling models, as well as key battleground races, though they missed surprises like Texas Gov. Greg Abbott’s loss and Democratic Senate victories in Iowa and South Carolina. asserted
they → call → Iowa
Trading volume on down-ballot elections grew nearly fivefold from the 2024 cycle to this year’s midterms to $1.8 billion, according to a Semafor analysis of the sites’ public data feeds. uncertain
volume → grow → feeds
Sports and crypto bets still dwarf election contracts across both platforms, and the 2026 midterms attracted less trading interest than the presidential race. asserted
midterms → dwarf → race
Prediction markets have been racing to win over the sports-betting and gambling industries’ customers, executing aggressive ad campaigns to expand their influence. asserted
markets → race → influence
Kalshi has struck business partnerships with media outlets including CNN and Dow Jones, and its ad campaign on Meta rivals super PAC spending; Kalshi and Polymarket have also aired a slew of star-studded ads. asserted
Kalshi → strike → ads
But it’s one thing to bring in revenue, it’s another to do what the prediction markets say they do well: predict. asserted
they → ’ → what
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