TheStreet) -- CHANGE IN RATINGS Arch Coal ( ACI) was initiated with a Buy rating at Societe Generale. $30 price target. Company has attractive exposure to the met coal market, Societe Generale said. Ann ( ANN) was initiated with a Buy rating at Sterne Agee. $32 price target. Valuation call. Airgas ( ARG) was upgraded at KeyBancfrom Hold to Buy. $85 price target. Strong growth particularly in the early parts of an industrial recovery, Keybanc said. Peabody Energy ( BTU - Get Report) was rated new Hold at Societe Generale. $60 price target. Citigroup ( C - Get Report) was upgraded at Banc of America/Merrill Lynch to Buy from Neutral. $53 price target. Stock is inexpensive, based on its core earnings power, BofA/Merrill Lynch said. Gilead ( GILD - Get Report) was upgraded at Piper Jaffray from Neutral to Overweight at Piper Jaffray. $53 price target. Company signed agreement with Johnson & Johnson ( JNJ) for HIV drug. Nike ( NKE - Get Report) was upgraded at Capstone Investments from Hold to Buy. $105 price target. Company held an upbeat investor meeting and can generate better long-term sales growth. Susquehanna ( SUSQ) was upgraded at Jefferies to Buy. $10 price target. Stock is attractive following a recent pullback, Jefferies said. End of report.