Key Calls (Tuesday): Upgrades, Downgrades & Initiations

Via Bloomberg Aircastle (AYR) raised to neutral at BofAML, PT $26 Atlantica Yield (ABY) raised to buy at Guggenheim, PT $23 Bioverativ (BIVV) raised to overweight at Piper Jaffray CSX (CSX) raised to buy at Deutsche Bank Hershey (HSY) raised to hold at SocGen, PT $110 U.S. Steel (X) raised to outperform at Cowen Assured Guaranty (AGO) cut to market perform at KBW, PT $42 Century Aluminum (CENX) cut to sell at Deutsche Bank Exelixis (EXEL) cut to hold at Stifel, PT $22 Fiesta Rest