Polymarket US sues Ohio regulators over sports licensing rules, citing Commerce Clause
Polymarket US alleges in a federal complaint filed on 16 October that Ohio's in-state presence rules for sports betting licences violate the Commerce Clause.
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Prediction Markets news
Event contracts and prediction markets: CFTC and state action, court rulings, exchange launches and partnerships, and how the format is reshaping betting, sports and finance.
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Prediction
US midterm event contracts pass $750 million in volume, CNN reports
CNN says notional trading on 2026 US midterm contracts passed $750 million by 15 October, with more than 21,000 contracts listed on Kalshi and Polymarket.
Prediction
Underdog sues Tennessee officials in federal court over sports event contracts
Underdog filed in the Middle District of Tennessee on 13 October against eleven defendants, including Jonathan Skrmetti.
Prediction
S&P Global survey: 70% of active prediction market users trade sports contracts
The Kagan Q3 2026 survey found 10% of respondents traded on yes/no exchanges in the past year, and 61% of traders are under 35.
Prediction
CFTC proposes swap definition covering sports event contracts, report says
iGaming Business reports the CFTC's 9 October proposal would define swaps to include sports, politics and weather event contracts, amid a circuit split.
Prediction
Kalshi saw 598,464 contracts on Cardinals' No. 3 pick, Gambling Insider reports
Gambling Insider's review of Kalshi trade records shows Jeremiyah Love's third-pick contract drew the heaviest volume of 38 players, at 598,464.
Prediction
NFL files Supreme Court brief urging review of Kalshi sports contracts case
The league backs petitioners in Flaherty v. KalshiEx, LLC, arguing sports event contracts are not swaps under Dodd-Frank and citing game-integrity gaps.
Prediction
39 states back New Jersey in Supreme Court case against Kalshi
Ohio led 39 states and the District of Columbia in a joint brief, while the Seminole Tribe of Florida sued DraftKings in state court.
Prediction
Coinbase agrees to end sports event contracts in Michigan by 10 October
The Michigan regulator says Coinbase will stop listing sports event contracts and close open positions by 10 October; the legal dispute continues.
Prediction
IAGR and NAGRA file amicus brief in New Jersey's Kalshi Supreme Court case
The two regulator associations filed an amicus brief on 2 October in New Jersey's Kalshi case; states won in the Sixth and Ninth Circuits.
Prediction
Genius Sports launches Prediction.com comparison site built on $1.2bn Legend deal
Genius Sports launched Prediction.com, showing data from 11 prediction market apps alongside live sports data. Its Legend unit built the site.
Prediction· Data
Kalshi and Polymarket account for 1.33m of 2.8m NFL betting app downloads in Week 2
Sensor Tower data quoted by Citizens put Week 2 downloads at 2.8m, up 28% year over year; Polymarket and Kalshi lead DraftKings and FanDuel over two weeks.
Prediction
Ohio reportedly orders 10 prediction market firms to stop sports contracts by 16 October
Yogonet reports the Ohio commission has told 10 prediction market operators and brokers to end sports event contracts by 16 October.
Prediction
Ninth Circuit backs two tribes against Kalshi sports contracts on tribal land
The appeals court held that two tribes are likely to show Kalshi's sports event contracts violate IGRA when users trade from reservations, and remanded.
Prediction
Texas Senate hearing: AGA and Kalshi testify on prediction markets
The 15 September Texas Senate State Affairs hearing on prediction markets heard from the AGA's Tres York and Kalshi's Robert DeNault.
Prediction
Polymarket keeps lead in US prediction-market search as Kalshi narrows gap
Blask data for January to August 2026 shows Polymarket at 57.8% of branded search, down from 74.3%, while Kalshi's trading volume remains far higher.
Prediction
AGA, tribal leaders and casino CEOs target prediction markets at G2E
The AGA said it is on “wartime footing” as tribal leaders and Caesars and MGM chiefs joined the attack; no prediction market firms spoke.
