US stocks set to for a weak open, as fresh corporate earnings flood in By: CNBC.com News April 19, 2018 at 05:30 AM EDT U.S. stock index futures fluctuated ahead of Thursday’s open, as earnings season continued to deliver fresh results. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust