us stock indexes opened lower thursday following a sharp rally in the previous session as investors digested a fresh round of economic data the dow jones industrial average djia dropped 300 points or 09 to 33069 the sp 500 spx declined 12 while the nasdaq composite comp shed 15 the us economy expanded at a 32 annual rate in the third quarter a more robust pace of growth than previously reported thanks to strong consumer spending the increase in gross domestic product the official scorecard for the economy initially was reported at 26 and updated to 29 last month