These 10 large-cap stocks were the worst performers last week. Are they in your portfolio? NICE Ltd (NASDAQ:NICE) shares tumbled 15.60% after the company reported Q1 financial results and issued Q2 adjusted revenue guidance with its midpoint below estimates.  Petroleo Brasileiro S.A. (NYSE:PBR) shares plummeted 13.03% after Q1 sales missed consensus. Also, Brazil’s President Luiz Inacio Lula da Silva fired CEO Jean Paul Prates following a ...