By Chuck Mikolajczak NEW YORK (Reuters) – U.S. stocks ended sharply lower on Wednesday, as comments from Fed Chair Jerome Powell shattered initial optimism over a Fed policy statement that raised interest rates by 75 basis points but signaled that smaller rate hikes may be on the horizon. In a volatile trading session, equities initially moved higher in the wake of the hike by the Fed, the fourth straight increase from the central bank of that magnitude as it attempts to bring down stubbornly high inflation. The target federal funds rate was set in a range between 3.75% and 4.00%, but the impa…