Federal Charges Filed in Prediction Market Insider Trading Case

Prediction markets — basically apps where you can bet real money on whether something will happen, like an election outcome or a news event — have been exploding in popularity. Platforms like Polymarket and Kalshi are pulling in billions of dollars in bets every week. But that rapid growth has come with a serious problem: people with insider knowledge are cashing in, and the feds are now cracking down.

The most recent case involves Michele Spagnuolo, a 36-year-old Google software engineer. He's been charged with using confidential company information to make $1.2 million on Polymarket. Specifically, he allegedly placed bets on search trends based on internal Google data, and now faces charges of commodities fraud, wire fraud, money laundering, and other counts. The Commodity Futures Trading Commission also brought a separate civil case against him.

It's the second known case of the federal government filing criminal charges against someone who allegedly used insider information to make a large profit on a prediction market site. The first was a U.S. Army soldier: federal prosecutors charged him with using his insider knowledge of a clandestine military operation to capture Venezuelan leader Nicolás Maduro in January to reap more than $400,000 in profits on Polymarket. He reportedly left an obvious trail — prosecutors say he signed up for Polymarket with his personal email, and when media reports drew attention to the suspicious trades, he asked Polymarket to delete his account, claiming he had lost access to it.

And it doesn't stop there. NPR found that a Polymarket trader made around $300,000 correctly betting on President Biden's last-minute pardons, and another trader bet $553,000 about Iran and its Supreme Leader just before an Israeli strike killed him. Kalshi also suspended and fined three users for 'political insider trading' after an internal probe found that candidates had bet on their own campaigns.

So why does this matter to you, even if you've never placed a bet on one of these apps? Because this is a fast-growing, loosely regulated financial space that's increasingly tangled up with government secrets, corporate data, and political power. The Commodity Futures Trading Commission regulates prediction markets and prohibits insider trading, but there's growing concern that current laws haven't kept up with these new financial exchanges. Meanwhile, a growing number of House lawmakers are calling for a rule change to bar the lower chamber from using prediction markets, amid concerns that key decision makers and their staff can use insider information to bet and profit.

The platforms themselves say they're cooperating. Polymarket's chief legal officer said it 'is the only prediction platform to date whose cooperation has led to insider trading charges in the United States,' noting that crypto-based trades are traceable. But critics argue the system is still ripe for abuse — and the rules governing it are far from settled.