US futures point to a negative open; Facebook, trade in the spotlight By: CNBC.com News April 11, 2018 at 05:43 AM EDT U.S. stock index futures slipped ahead of Wednesday’s open, pulling back from the strong gains seen in the previous trading session. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust