These ten large-cap stocks were the worst performers last week. Are they a part of your portfolio?Unity Software Inc. (NYSE:U) fell 31.63% this week after CEO Matthew Bromberg made a post about the company and ‘world models’ on social media. The stock may be responding to recent news about Google’s Project Genie, which may impact gaming companies.Hecla Mining Company (NYSE:HL) decreased 33.33% this week. Precious metal stocks are traded lower after President Trump nominated Kevin Warsh for Fed Chair. Warsh’ ...