NEW YORK ( TheStreet) -- CHANGE IN RATINGS Accretive Health ( AH) was downgraded at Goldman Sachs from Buy to Neutral. $24 price target. Fairview contract loss could hang over the stock, Goldman said. Amazon.com ( AMZN) was initiated with a Market Perform rating at JMP Securities. Growth may be decelerating, and the company already trades at a premium valuation, JMP said. Autozone ( AZO) was upgraded at Goldman Sachs from Neutral to Buy. Company was also placed on the Conviction Buy list, Goldman said. $435 price target. Company is seeing higher commercial demand and has strong operating leverage. Best Buy ( BBY) was downgraded at McAdams, Wright Ragen from Buy to Sell. Confidence in management is waning, McAdams said. Beam ( BEAM) was downgraded from Buy to Neutral at Goldman Sachs. Valuation call, based on a $58 price target, Goldman said. Bridgepoint ( BPI) was initiated with a Hold rating at Deutsche Bank. $25 price target. Industry faces higher potential competition, Deutsche said. Fifth Third ( FITB) was upgraded at Stifel Nicolaus from Hold to Buy. $17 price target. Stock has lagged year-to-date, though the company is leveraged to better mortgage and loan growth, Stifel said. Global Payments ( GPN) was downgraded at Nomura Securities to Neutral. $46 price target. Company is seeing weaker sales growth, Nomura said. Global Payments was upgraded Hold to Buy at Stifel Nicolaus. $54 price target. Stock has overreacted to the recent security breach, Stifel said. Coca-Cola ( KO) was downgraded at Stifel Nicolaus from Buy to Hold. Valuation call, Stifel said. Pandora ( P) was initiated with an Outperform rating at JMP Securities. $14 price target. Listening growth should continue, JMP said. Primerica ( PRI) was upgraded to buy at TheStreet Ratings. Schlumberger ( SLB) was upgraded at Sterne Agee from Neutral to Buy. Stock is attractive, following a 15% decline, Sterne Agee said. $93 price target. Sothebys ( BID) was upgraded to buy at TheStreet Ratings. Constellation Brands ( STZ) was upgraded at Goldman Sachs from Neutral to Buy. Wine fundamentals appear to be improving, Goldman said. $29 price target. US Bancorp ( USB) was downgraded at Stifel Nicolaus from Buy to Hold. Valuation call, Stifel said. Waddell & Reed ( WDR) was downgraded at Sterne Agee from Buy to Neutral. Valuation call, based on a $34 price target, Sterne Agee said.