US futures sharply drop ahead of the open following Monday's market rally By: CNBC.com News October 02, 2018 at 05:07 AM EDT U.S. stock index futures fell deep into the red ahead of Tuesday's open. Read More >> Related Stocks: Dow Industrials SPDR Nasdaq ETF S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust