US stocks expected to drop at the open, as G-7 summit kicks off By: CNBC.com News June 08, 2018 at 05:33 AM EDT U.S. stock index futures tumbled ahead of the open on Friday, weighed down by negative sentiment seen by markets overseas. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust