NEW YORK ( TheStreet) -- CHANGE IN RATINGS American Tower ( AMT) was upgraded at Nomura to buy. $90 price target. Organic tower revenue growth remains strong, Nomura said. B/E Aerospace ( BEAV) was initiated Buy at Citigroup with a buy rating and $87 price target. The company has cyclical, secular and margin expansion opportunities, said Citigroup. Brady ( BRC) was downgraded to hold at TheStreet Ratings. Bristol-Myers Squibb ( BMY) was upgraded at J.P. Morgan to overweight from neutral. $52 price target. Meaningful long term upside from PD-1 and broader pipeline, J.P. Morgan said. Medassets ( MDAS) was downgraded at Lazard Capital Markets to neutral from buy. Valuation call, as the stock moved through the old $25 price target, Lazard Capital Markets said. PXD) was downgraded at Topeka Capital to buy from hold. Valuation call, based on a $195 price target, Topeka Capital said. QEP Resources ( QEP) was downgraded to hold at TheStreet Ratings. Umpqua ( UMPQ ) was upgraded at DA Davidson to buy from neutral. $20 price target. Sterling merger should improve effeciency, leverage and market share, DA Davidson said. Western Union ( WU) was upgraded at Sterne Agee to buy from neutral. $22 price target. Momentum is building as the company is moving through a transition year, Sterne Agee said.