Wall Street's major indexes had lost ground immediately after the Fed announced its rate hike decision.
After the press conference, money markets were betting on a terminal rate of 4.892% in June compared with bets for 4.92% just before the Fed's statement.
U.S. futures were still pricing in rate cuts this year with the fed funds rate seen at 4.403% by the end of December, the same as before the meeting.
The S&P 500 posted 24 new 52-week highs and no new lows; the Nasdaq Composite recorded 136 new highs and 23 new lows.
About 13.7 billion shares changed hands in U.S. exchanges, compared with the 11.5 billion daily average over the last 20 sessions.