The Supreme Court has stripped the Securities and Exchange Commission of a major tool in fighting securities fraud in a decision that also could have far-reaching effects on other regulatory agencies.

The justices ruled in a 6-3 vote that people accused of fraud by the SEC, which regulates securities markets, have the right to a jury trial in federal court. The in-house proceedings the SEC has used in some civil fraud complaints violate the Constitution, the court said.

The SEC was awarded more than $5 billion in civil penalties in the 2023 government spending year that ended Sept. 30, the agency said in a news release. It was unclear how much of that money came through in-house proceedings or lawsuits in federal court.