Efforts to prevent insider trading on the platforms have renewed calls for a broader ban on congressional stock trading.

LONDON, March 12 (Reuters Breakingviews) - Sites like Polymarket and Kalshi can, in theory, reveal the truth about the future. Yet they risk being undermined by those who already know it. Prediction ...

Polymarket has revised its trading rules, adding tighter controls as prediction markets draw closer attention from regulators and competitors. The company announced the updated standards apply across ...

In the last few weeks, three governors have signed executive orders targeting potential insider trading by state employees on prediction markets.

Tom Hardin should’ve known better. As “Tipper X,” a wired informant in the insider trading investigation the FBI called Operation Perfect Hedge, Hardin had specifically been told to “shut it down” if ...

Robert G. Kramer sold nearly 90,000 shares of his stock in Emergent BioSolutions, knowing that large quantities of vaccine materials were contaminated, the lawsuit said. By Neil Vigdor and Chris Hamby ...

A flurry of bets made prior to major announcements about the Iran war has ramped up speculation that individuals or groups with advance knowledge of U.S. military plans are cashing in on insider ...