US futures set for a mixed open as global trade tensions fester By: CNBC.com News September 04, 2018 at 05:36 AM EDT U.S. stock index futures fluctuated ahead of Tuesday's open, as trade tensions between the U.S. and major economies continued. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust