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

The emergence of sites like Polymarket and Kalshi has interested players betting on almost anything, creating the risk that individuals will trade on inside information to profit. Congress is ...

The problem of traders turning a buck on inside information is as old as markets themselves. But in the past year, the scope of insider trading has grown to unprecedented levels thanks to new ...

As real money floods into platforms like Kalshi, the question of who knows what before markets move is no longer theoretical.

A press briefing cut suspiciously short. A long-shot bet on the former Venezuelan president’s downfall made just hours before his capture. A flood of trades from brand-new accounts predicting a ...