U.S. stocks soared Wednesday after the Federal Reserve approved its biggest interest-rate increase since 1994 but suggested moves of that scale likely wouldn’t become common. Stocks were volatile after the decision but turned higher as Fed Chairman Jerome Powell spoke in his post-meeting news conference.

Ending weeks of speculation, the rate-setting Federal Open Market Committee took the level of its benchmark funds rate to a range of 1.5%-1.75%, the highest since just before the Covid pandemic began in March 2020.

"Clearly, today's 75 basis point increase is an unusually large one, and I do not expect moves of this size to be common," Powell said. He added, though, that he expects the July meeting to see an increase of 50 or 75 basis points. He said decisions will be made "meeting by meeting" and the Fed will "continue to communicate our intentions as clearly as we can."