Today's noteworthy upgrades include: CF Industries (CF) upgraded to Positive at Susquehanna... ExlService (EXLS) upgraded to Buy from Neutral at BofA/Merrill... Fitbit (FIT) upgraded to Buy at BofA/Merrill... Forward Air (FWRD) upgraded to Outperform at Baird... HD Supply (HDS) upgraded to Positive from Neutral at Susquehanna... Hannover Re (HVRRY) upgraded to Overweight from Underweight at JPMorgan... Moody's (MCO) upgraded to Buy from Neutral at UBS... PRA Group (PRAA) upgraded to Strong Buy from Market Perform at Raymond James... Plum Creek Timber (PCL) upgraded to Outperform from Sector Perform at RBC Capital... Shire (SHPG) upgraded to Outperform from Market Perform at Leerink... Yandex (YNDX) upgraded to Overweight from Equal Weight at Morgan Stanley... Zayo Group (ZAYO) upgraded to Buy from Neutral at MoffettNathanson.