NEW YORK ( TheStreet) -- CHANGE IN RATINGSAmazon.com ( AMZN) was downgraded at Bank of America/Merrill Lynch to Neutral. Valuation call, based on a $235 price target, BofA/Merrill said. Abercrombie & Fitch ( ANF) was upgraded at Brean Murray from Hold to Buy. $65 price target. Estimates also boosted, as business trends appear to have bottomed, Brean Murray said. Addus Homecare Corp. ( ADUS) was upgraded to hold at TheStreet Ratings. Alliant Techsystems ( ATK) was upgraded at JP Morgan from Neutral to Overweight. Valuation call, as the stock has seen a sharp selloff in recent weeks, JP Morgan said. Concho Resources ( CXO) was upgraded at Deutsche Bank to Buy from Hold. $131 price target. Concho has underperformed its peers 13% year to date on unwarranted concerns, Deutsche Bank said. Cytec Industries ( CYT) was downgraded at Citigroup to Neutral from Buy. $66 price target. Rally suggests the coatings valuation bar has been raised, Citigroup said. Exelis ( XLS) was downgraded at JP Morgan to Neutral. Valuation call, as the stock is up 38% year-to-date, JP Morgan said. Frontier ( FTR) was upgraded at Nomura from Neutral to Buy. $5 price target. Stock is attractively valued, with a 10% dividend and 20% free cash flow yield, Nomura said. GAIN Capital Holdings ( GCAP) was downgraded to sell at TheStreet Ratings. Groupon ( GRPN) was downgraded from Hold to Sell at Stifel Nicolaus. Business model remains a work in progress, Stifel Nicolaus said. Groupon ( GRPN) was downgraded from Buy to Neutral at Bank of America/Merrill Lynch. Restatement undermines investor confidence, BofA/Merrill said. $20 price target. Kohl's ( KSS) was upgraded at JP Morgan from Underweight to Neutral. $55 price target. Stock has underperformed its peers over the past five months, JP Morgan said. Linear Technology ( LLTC) was downgraded at UBS to Neutral from Buy. $35 price target. Valuation ahead of fundamentals, UBS said. PAREXEL International ( PRXL) was downgraded at Sterne Agee to Underperform from Neutral. $24.50 price target. Guidance unlikely to support recent outperformance, Sterne Agee said. PVH ( PVH) was upgraded at Credit Suisse from Neutral to Outperform. Demand is improving in the U.S. and Europe, Credit Suisse said. $105 price target. Regeneron Pharmaceuticals ( REGN) was initiated with a Buy rating at Goldman Sachs. $144 price target. Anticipate continued robust uptake of new drug Eylea, Goldman said. SL Green Realty ( SLG) was downgraded at UBS to Neutral from Buy. $80 price target. Lacking meaningful positive catalysts, UBS said.