White House officials sent an internal email reminding staff not to use nonpublic information for trading or betting on prediction markets like Kalshi or Polymarket.

The March 24 message warned that such activity is a criminal offense and violates federal ethics rules.

It came amid media concerns about possible misuse of sensitive information for financial gain by government employees.

The warning followed reports of unusual market activity around President Donald Trump’s public posts about Iran policy decisions, CBS News has reported.

The White House said all employees must follow ethics guidelines and denied any evidence of wrongdoing.