Shares of grocery giant SUPERVALU Inc. (NYSE: SVU) jumped as much as 13.8% on Thursday after getting an upgrade from an analyst. At 11:55 a.m. EDT, the stock was still up 12.7% on the day. RBC Capital analyst William Kirk upgraded SUPERVALU's stock from sector perform to outperform and put a price target of $6 on it, which implies over 60% upside from where shares trade right now.