“Who was it? Trump? A family member? A White House staffer?” asked US Sen. Chris Murphy.

“It’s Monday morning, there’s no important data today, there aren’t any Fed speakers you’d want to front-run. It’s an unusually large trade for a day with no event risk,” the trader said. “Somebody just got a lot richer.”

A BBC review of market data similarly found that “traders bet hundreds of millions of dollars on oil contracts just minutes before” Trump’s announcement of talks with Iran. Iranian officials publicly denied that they are negotiating with the Trump administration, and Iran’s top lawmaker accused the US president of peddling “fake news” in an attempt to “manipulate the financial and oil markets.”