Wall Street opens flat as investors await Yellen

Major US stock markets opened Friday's trading session slightly higher, following the revised up Q1 GDP. However, the main focus of attention in markets today is likely to be a speech later from Janet Yellen. At the session start, the Standard & Poor's 500 Index and the Dow Jones Industrial Average jumped 0.11%, opening at 2,092.30 and 17,847.20 points respectively, whereas the Nasdaq Composite Index grew 0.07% to 4,905.40 points.