Dow Jones industrial futures are down 17 points to 13,103 and the broader S&P futures have given up 3.4 points to 1,394.80. Nasdaq futures are down 0.75 points at 2,706.
China's factory output grew at the slowest pace in three years last month and retail sales weakened. One bright spot is auto sales. China's auto sales rose 11 percent in July.
The Labor Department is expected to report Thursday that more Americans likely applied for unemployment benefits last week, although broader trends suggest that there is a modest uptick in hiring.
The government also reports wholesale inventories and trade deficit numbers Thursday.