Stocks ended mostly lower Wednesday, unable to maintain gains seen after Federal Reserve policy makers signaled they would deliver no rate increases this year and offered a detailed plan to end the wind-down of its balance sheet. After erasing early losses to turn higher in the wake of the announcement, stocks drifted back into negative territory, with the S&P 500 /zigman2/quotes/210599714/realtime SPX -3.37% ending 0.3% lower near 2,824, according to preliminary figures, while the Dow Jones Industrial Average /zigman2/quotes/210598065/realtime DJIA -4.06% shed more than 140 points, or 0.5%, to finish near 25,746. The Nasdaq Composite /zigman2/quotes/210598365/realtime COMP -3.79% clung to a gain, ending 0.1% higher near 7,729. Financial stocks were a drag, feeling heat as the Fed decision prompted a sharp decline in Treasury yields, a negative for lenders. Financials led sector losers in the S&P 500, falling 2.1%.