Slight uptick in Consumer spending

New York (AP) - U.S. stock futures are falling after two consecutive days of solid gains.  But the S&P 500 index is still headed for its strongest weekly percentage increase since mid-July.  Investors may be taking a pause ahead aof retail sales data due from the Commerce Department on Friday.  Retailers offer an undefined look at the mood of the American consumer, who's spending drives about 70% of all U.S. economic activity. Most economists expect a slight uptick in consumer spending for August.