Here's a financial puzzle: how do you make money betting on geopolitical events? According to Senator Elizabeth Warren (D-Mass.), the answer for some traders might be: have inside information.
Warren called for an investigation into alleged insider trading on prediction markets on Tuesday, pointing to what she called "well-timed bets" placed just ahead of U.S. strikes on Iran back in February. In a post on X, she argued that correctly anticipating military action isn't just good luck—it looks suspicious.
"That's not luck. That looks like insider trading," Warren said. "A handful of insiders should not be allowed to turn global crises into personal paydays."
This isn't Warren's first move on this front. Last month, she and 37 other lawmakers sent a letter to the Commodity Futures Trading Commission and the Office of Government Ethics. Their request was pretty straightforward: take action against illegal insider trading in prediction markets, particularly by federal employees who might have access to non-public information.
The letter referenced several cases, including one where a user on the prediction market platform Polymarket reportedly made $400,000 by betting on the capture of Venezuela's former leader, Nicolas Maduro.
But the Iran-related bets have drawn the most scrutiny. Here's where it gets interesting: blockchain analysis apparently revealed that six suspected insider accounts made a cool $1.2 million at the exact time of the U.S. strikes on Iran. That timing raised enough eyebrows for Senator Chris Murphy (D-Conn.) to introduce legislation aimed at banning war betting altogether.
The story doesn't end there. Later, newly created anonymous accounts managed to book over $480,000 in profits by betting on a ceasefire before April 7.
All this activity has caught the attention of law enforcement. Manhattan's top fraud prosecutors met with Polymarket last month to discuss whether these lucrative bets might violate insider trading laws and other federal statutes.
For his part, Polymarket's founder and CEO, Shayne Coplan, has previously emphasized the accuracy of his platform, calling it "the most accurate thing" in mankind. When it comes to the possibility of insider trading, he acknowledged the "inevitability" of people trying to find an edge in the market. It's a candid admission in an industry that sits at the intersection of finance, technology, and global events.
The core question Warren is raising is a fundamental one for prediction markets: where does savvy analysis end and improper advantage begin? When you're betting on real-world events with real-world consequences, the line between informed speculation and trading on non-public information gets blurry fast. And when those events involve military action, the stakes—both financial and ethical—are particularly high.
