U.S. stock futures are pointing to a higher open on Wednesday after ending Tuesday's session lower. Shares of Twitter surged after posting quarterly results which topped Wall Street forecasts. What ended up being a boon for the company was all the soccer fans who were tweeting June and July during the World Cup. As of June 30, Twitter said, it had 271 million monthly average users, up from 255 million as of March 31. Also moving higher on Wednesday, shares of American Express after the company posted quarterly results which beat estimates by a nickel a share. Card holder spending was up 9% year-over-year. American Express cardholders tend to be more affluent than other credit card users, which is one reason the company has done well as the nation's economy has gradually improved since the recession. TheStreet's Ruben Ramirez has details from New York.