Futures turn lower as Yellen, Brexit vote eyed By: CNBC.com News June 22, 2016 at 05:20 AM EDT U.S. futures were indicating a lower start for stocks after two straight sessions of gains. Read More >> Related Stocks: Dow Industrials SPDR PowerShares QQQ S&P 500 Ishares Core ETF SPDR S&P 500 ETF Trust Sentinelone Inc Cl A