New York, May 15 (BridgeNews) - U.S. stocks ended almost unchanged even though the Federal Reserve cut interest rates by half a percentage point and left the door open for further cuts down the road. Analysts said the news had been built into share prices and that the economic weakness, prevalent before the rate cut, still exists. The Nasdaq closed up 3.80, or 0.18%, to 2085.72. The Dow was down 4.36, or 0.04%, to 10,872.97 and the S&P 500 was up 0.51, or 0.04%, to 1249.43.