Prediction platform Polymarket has suspended its market for betting on nuclear explosions because of

Polymarket Pulls Nuclear Betting Markets Amid Iran Conflict and Insider Trading Fears

Polymarket just took down some long-running betting markets. These were the ones where people could wager on whether a nuke would actually go off. The timing's pretty telling—it's happening right in the middle of all this tension with Iran, and after a bunch of criticism about folks possibly trading on inside info related to warfare.

These nuclear contracts were no small thing. At one point, they were pricing in a risk as high as 19%, and we're talking millions of dollars in trading volume. They've got people worried again that someone on the inside might use advanced knowledge of military moves to make a quick buck.

And this whole mess is playing out while the CFTC is hashing out new rules. They're looking at banning regulated exchanges from offering event contracts tied to stuff like war, terrorism, assassinations—basically anything that's seen as against the public interest.

For years, you could bet on a nuclear detonation on Polymarket. It was just a thing. But with the Iran situation blowing up and everyone suddenly hyper-focused on whether insiders are trading on war secrets, the platform apparently decided enough was enough and pulled the plug on those contracts.

These markets had been kicking around Polymarket for ages. They'd ask you to put a probability on a nuke going off by some specific date. And historically? They always resolved to "No." Every single time.

There was even this tweet from David Sirota back in March 2026, pointing out that Polymarket had created a market to monetize a nuclear attack, all while concerns were growing that government insiders—people who actually help make military decisions—might be placing bets.

These contracts really got dragged back into the spotlight because of all the flak prediction markets have been catching lately. Apparently, some trader reportedly made over 400 grand betting on Nicolás Maduro getting ousted, right before a U.S. military operation that led to his capture. That whole situation got everyone asking: could insiders be using these platforms to bet on when a war might kick off, like the start of this whole Iran thing, or other secret military stuff?

If you look at the trading history, these contracts weren't totally out to lunch. They actually priced in some real risk from time to time.

Back in 2023, there was a Polymarket contract that, for a while, implied there was roughly a 19% chance a nuke would be detonated before the year ended. That's according to the platform's own data.

Then there was another one, expiring in June 2025, that was trading close to 12% at one point.

And people were putting real money on this stuff. The 2025 contract alone saw over $1.7 million in trading volume. The 2023 one? That pulled in nearly $700,000 in bets.

So where does all this leave us? Right in the middle of U.S. regulators trying to figure out how to handle prediction markets.

Back in 2024, the CFTC proposed a rule. It would stop any exchange they regulate from listing event contracts related to war, terrorism, assassination, or anything else they decide is against the public interest.

And the CFTC chairman, Mike Selig, has said they're planning to put out some clearer guidance on prediction markets pretty soon.