U.S. markets and stock exchange traded funds wavered Tuesday as investors focused on the battered tech segment. On Tuesday, the Invesco QQQ Trust (NASDAQ: QQQ) was up 0.9%, SPDR Dow Jones Industrial Average ETF (NYSEArca: DIA) fell 0.5%, and iShares Core S&P 500 ETF (NYSEArca: IVV) was 0.1%...