Here's a classic finance story: someone makes a lot of money right before big news hits the market. The question is always the same—lucky guess, or did they know something?

Congressman Sam Liccardo (D-Calif.) thinks he's spotted the latter. He's calling for an investigation into a series of large trades in crude oil and S&P 500 E-mini futures that were placed shortly before President Donald Trump disclosed developments related to U.S. actions involving Iran. In a letter sent Friday to Securities and Exchange Commission Chair Paul Atkins and Commodity Futures Trading Commission Chair Michael Selig, Liccardo didn't mince words.

"The timing indicates bets were placed by those with advance knowledge of the President's action, strongly suggesting illicit trading on insider information," he wrote.

Let's break down the timeline that's raising eyebrows. According to the concerns flagged by Liccardo, significant positions in oil markets were taken just hours before news of a U.S.-Iran ceasefire. Separately, a notable surge in S&P 500 E-mini futures trading happened roughly 15 minutes before Trump announced that military action would be delayed.

Why does that timing matter? Because after the announcement, the market did exactly what you'd expect: equities rallied, and oil prices declined. Anyone positioned correctly in those futures markets right before the news would have made a very tidy profit. Liccardo described this as part of a broader, worrying trend of "well-timed, large-volume trades" occurring just before major geopolitical updates hit the wires.

The congressman's letter is essentially a formal request for the SEC and CFTC to do their jobs. He's asking them to determine whether any individuals used nonpublic government information to line their pockets. He's also posing a bigger, systemic question: do regulators even have the right tools to track this kind of activity and stop people from trading on sensitive, inside information about matters of state?

But Liccardo didn't stop at traditional futures markets. He also pointed a finger at prediction markets—those platforms where people can place bets on geopolitical and policy outcomes. He argues that similarly well-timed wagers could signal "a pattern of insider corruption."

He's not the first lawmaker to worry about this. Senator Elizabeth Warren (D-Mass.) has previously urged authorities to look into potential insider trading on prediction markets, specifically pointing to suspicious bets placed ahead of U.S. strikes on Iran. That scrutiny has been intense. Blockchain data has reportedly shown that six suspected insider-linked accounts made about $1.2 million by placing wagers at the exact time of those U.S. strikes. That evidence was compelling enough to prompt Senator Chris Murphy (D-Conn.) to propose an outright ban on war-related betting.

So, what we have here is a familiar pattern playing out in a high-stakes arena. Unusual market activity right before major news. A lawmaker crying foul and asking for an investigation. And a lingering question that's as old as markets themselves: was it genius, or was it a cheat?

The regulators now have the ball. They get to decide if this was just a remarkable coincidence or something that requires a much closer, and potentially uncomfortable, look.