U.S. Stock ETFs Slip, Erasing Early Gains

U.S. markets and stock ETFs stumbled Friday, losing their grip on early morning gains and heading toward the end of a volatile short week filled with a steep contraction. On Friday, the Invesco QQQ Trust (NASDAQ: QQQ) declined 1.4%, SPDR Dow Jones Industrial Average ETF (NYSEArca: DIA) was flat,...