Following a four day up trend, stock is now on a flat. On Tuesday, investors cheered and pushed the market up after realized that the Fed policy will not change much under Janet Yellen. Yellen stated that the Fed will continue its taper as the economy improve and added that the emerging market problem will have no effect on US economy outlook. Other factors that contribute to the stock moving up is the surprise number on January trade data from China that is better than expected and also the progress toward a debt ceiling is in a good news.