Solar energy stocks had another rough week as interest rate fears and new investor lawsuits came to light. According to data provided by S&P Global Market Intelligence, SunPower (SPWR 5.99%) was down by as much as 13.2% this week, Sunrun (RUN 4.00%) dropped by as much as 25.4%, and Sunnova Energy (NOVA 6.43%) was off by 19.1% at its low point. Those stocks closed the week down by 6.6%, 21.3%, and 16.4%, respectively. Interest rates plague solar stocks The biggest factor hitting solar energy stocks this week ...