Oil front and center for Wall Street; data eyed By: CNBC.com News June 21, 2017 at 05:48 AM EDT U.S. stock index futures pointed to a slightly lower open on Wednesday, with investors keeping a close eye on moves in the oil market. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust