JANCO Partners upgraded Sunpower (SPWRA) this morning from Accumulate to Buy because they believe the sell off after earnings is overdone. 

Hat tip to StreetInsider.com for the following analyst comment:

“We are upgrading the stock to a Buy rating based on the upside potential in the stock given the recent pullback since the company announced earnings on 10/22/2009. With the pullback the stock is currently trading at 14.9X our FY2010 EPS estimate of $1.82, which … Read the rest