U.S. markets and stock exchange traded funds were struggling Wednesday after running up equities to record highs. On Wednesday, the Invesco QQQ Trust (NASDAQ: QQQ) was down 0.3%, SPDR Dow Jones Industrial Average ETF (NYSEArca: DIA) was up 0.1%, and iShares Core S&P 500 ETF (NYSEArca: IVV) was...