U.S. markets are trading in the green as stocks add to gains after consumer sentiment figures blew past expectations. The Conference Board's Consumer Confidence Index hit 94.7 versus estimates for 87 in October. One reason for the big increase, lower gas prices may be helping sentiment. Shares of Twitter (TWTR) are down sharply after the micro-blogging site delivered a disappointing earnings report. Twitter's actual numbers were in line with expectations and its revenue was even slightly above estimates, but the micro-blogging site reported user metrics that were just not good enough for investors. Federal Reserve Chair Janet Yellen and her colleagues are meeting for a two-day session. Economists are expecting an end to the Fed's stimulus program. Investors will be looking for clues as to when the Fed will start raising rates. The Fed will announce their policy decision on Wednesday at 2 pm, eastern. TheStreet's Susannah Lee has details from New York.