Wall Street extends gains, helped by GDP data

While strong data points to increased chances of an interest rate hike in September, some investors said the recent volatility in markets triggered by fears of slowing growth in China could force the U.S. Federal Reserve to hold back on a rate increase next month. A rate hike could put a stop to easy money that has helped fuel global markets in the past few years. Kansas City Federal Reserve President Esther George, who has been arguing for a near-term U.S. rate hike, said the Fed should now tak