After a long time the US Stock market showed a down trend after three days which was the result of Alcoa Inc. , when it began the quarterly earnings season by missing analystâs estimates and the Federal Reserve's damped speculation that interest rates will drop anytime soon from now. Alcoa, the first member of the Dow Jones Industrial Average to report, dropped along with Monsanto Co., the world's largest maker of genetically modified seeds, whose profit also follow forecasts? Stock slides within minutes after Federal Reserve's last policy meeting showed officials predict a substantial risk'' that inflation may not slow as expected. Prices reached the day's low after a plane crashed into an apartment building in New York, though the losses were recouped within minutes. The S & P's 500 Index lost 3.47, or 0.3%, to 1349.95. Exxon Mobil Corp. and other energy companies showed the worst performers among the S&P 500's the 10 industry groups as oil fell to the lowest this year. The Dow industrials dropped 15.04, or 0.1%, to 11,852.13. The NASDAQ Composite Index fell 7.16, or 0.3 %, to 2308.27. About two stocks fell for every one that rose on the New York Stock Exchange. Some 1.6 billion shares changed hands on the Big Board, 3 % more than the three-month daily average. This is the stock which showed an increasing trend in the US market General Motors Corp. rose 23 cents to $32.13. The world's biggest automaker is close to an agreement to provide financial aid to Delphi Corp., a bankrupt auto-parts maker