Kalshi CEO says DOJ will prosecute insider trading on prediction markets

Mansour: insider trading is a federal crime

Tarek Mansour, CEO of prediction market Kalshi, told a Semafor World Economy audience that insider trading on platforms like his is — and should be treated as — a federal crime. “If you commit insider trading on Kalshi, that can and will at some point be a federal crime. It is a federal crime,” he said, adding flatly: “I actually do expect the DOJ to prosecute some of these cases.” It has been reported that federal prosecutors are already exploring whether certain bets on prediction markets violate insider trading laws.

The problem: suspicious bets and privileged information

Prediction markets are built on information — fast, granular, sometimes eyebrow-raising information. But that’s also the rub. It has been reported that large, suspiciously timed bets have allegedly raised alarms: wagers on how often President Trump would visit Mar‑a‑Lago in April, or on the timing of a SpaceX IPO, have prompted public outcry. Who wins when someone already knows the answer? Short answer: the market’s credibility takes the hit.

Enforcement vs. patchwork regulation

Kalshi says it’s trying to play referee. Mansour told the audience the company will ban insider trading, impose fines and even pursue criminal referrals — “find them and deter them,” he said — and that the firm has already released some cases publicly with more to come. He also pressed for a federal consumer‑protection framework rather than a state‑by‑state approach that “has failed.” The federal government has itself sued three states that tried to regulate prediction markets, setting the stage for a bigger fight over jurisdiction.

What’s at stake

If the DOJ does move to prosecute, it could be a watershed moment: enforcement would give prediction markets legal teeth, but could also chill participation or push activity into darker corners. Can these platforms keep being a real-time pulse of public expectations while also policing insider edges? That’s the question regulators, operators and users will be watching — closely, and probably with wallets on the line.

Sources: semafor.com, Hacker News