These 10 large-cap stocks were the worst performers last week. Are they in your portfolio? National Grid Transco (NYSE:NGG) decreased 17.1% after the company reported an equity raise of £7 billion and a year-over-year decrease in full-year revenue results.  James Hardie Industries Plc (NYSE:JHX) shares declined 14.4% after the company reported worse-than-expected Q4 financial results. KE Holdings Inc (NYSE:BEKE) shares lost 14% in the last week after the company reported Q1 financial results. JD.Com, Inc. (NASDAQ:JD) stock ...