The warning came after a flurry of unusual activity on oil and stock futures markets shortly before President Trump said he would pause attacks on Iran.

Investors placed an approximately $950 million bet on oil prices falling just hours before the U.S. and Iran announced a ceasefire, the latest large wager on the direction of the…

The platforms have grown in popularity, with some users making bets on global events.

The warning came after a flurry of unusual activity on oil and stock futures markets shortly before President Trump said he would pause attacks on Iran.

Members of the White House staff were issued a warning last month about placing bets on prediction markets on the Iran war with nonpublic information.