The practical guide to prediction market categories, with examples and the rules-based limits that shape them - plus the boundaries you should know before you trade.

Polymarket is defending its decision to host markets on the timing of U.S. strikes on Iran, arguing the contracts can surface “accurate, unbiased forecasts” in moments when information is chaotic.

OpenAI has terminated an employee after an internal probe found they used nonpublic company information to trade on external prediction markets, including Polymarket.

Polymarket and Kalshi drew an extraordinary wave of trading tied to the weekend’s U.S.-Israel strikes on Iran, with contracts referencing the timing of attacks and Iran’s leadership outcomes. The surge is now colliding with allegations of suspicious ...

Kalshi is facing user backlash after changing how it settled a market tied to Iranian Supreme Leader Ali Khamenei leaving power following his reported death. The episode is renewing questions about how prediction platforms write rules for sensitive ...

Major League Soccer has handed lifetime bans to Derrick Jones and Yaw Yeboah after an investigation found they bet on MLS matches - including games involving their own teams and individual performances.

See how regulated prediction markets work end to end, from what you’re trading and how prices are shown, to how orders fill and positions settle for payout.

FanDuel and DraftKings have filed applications with the Arkansas Racing Commission to enter the state as third-party mobile sportsbook partners tied to in-state casinos. If approved, the move could reshape a market that has historically been tough ...

Indiana lawmakers have pushed an amended sweepstakes ban closer to the finish line, sending House Bill 1052 back to the House after Senate changes. With the legislature aiming to wrap the 2026 session by Feb. 27, the window to get it to Gov. Mike ...

A federal judge in Tennessee has granted Kalshi a preliminary injunction that blocks state officials from enforcing Tennessee sports betting laws against the company’s sports event contracts while the case plays out

The Trump administration is escalating a federal-state clash over prediction markets, with the Commodity Futures Trading Commission now publicly - and legally - asserting that states cannot shut down CFTC-regulated event contracts.