Today's noteworthy upgrades include: Bojangles (BOJA) upgraded to Buy from Neutral at BofA/Merrill... Booz Allen (BAH) upgraded to Outperform from Market Perform at William Blair... Duke Energy (DUK) upgraded to Buy from Neutral at UBS... Envision Healthcare (EVHC) upgraded to Buy from Neutral at Citi... Finish Line (FINL) upgraded to Buy from Underperform at BofA/Merrill... Foot Locker (FL) upgraded to Neutral from Underperform at BofA/Merrill... HEICO (HEI) upgraded to Buy from Underperform at BofA/Merrill... ServiceMaster (SERV) upgraded at RBC Capital... Spirit Airlines (SAVE) upgraded to Buy from Hold at Stifel... Syngenta (SYT) upgraded to Buy from Hold at Jefferies.