US futures build upon gains as China-US trade developments show signs of hope By: CNBC.com News August 17, 2018 at 05:18 AM EDT U.S. stock index futures edged into the black ahead of Friday’s open, adding onto the gains seen in the previous session. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust