US stocks expected to tumble at the open, as trade tensions escalate By: CNBC.com News June 18, 2018 at 05:45 AM EDT U.S. stock index futures fell deep into the red ahead of Monday’s open, after the U.S. and China announced new tariffs against one another. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust