NEW YORK ( TheStreet) -- CHANGE IN RATINGS Amazon.com ( AMZN) was initiated with a buy rating and $340 price target at Citigroup. Retail margin expansion and the opportunity in AWS are underappreciated by investors, Citigroup said. Baxter ( BAX) was initiated with an outperform rating at Credit Suisse. $81 price target. Company can deliver solid organic sales growth, Credit Suisse said. Bemis ( BMS) was downgraded at J.P. Morgan to neutral from overweight. Valuation call, as the stock is up 21% year to date, J.P. Morgan said. eBay ( EBAY) was initiated with a buy rating and $65 price target at Citigroup. Marketplace and PayPal will both drive significant growth going forward, Citigroup said. Facebook ( FB) was initiated with a neutral rating and $27 price target at Citigroup. The transition from desktop to mobile platforms leaves too many uncertainties in the near term, Citi said. FTNT) was upgraded at Jefferies to buy. $23 price target. Stock has 5-1 risk-reward potential from current levels, Jefferies said. Google ( GOOG) was initiated with a buy rating and $1,100 price target at Citigroup. The company offers solid secular growth, cost and pricing improvements, and an attractive valuation, Citi said. GSV Capital ( GSVC) was downgraded to sell at TheStreet Ratings. Healthcare Trust of America ( HTA) was initiated with a hold at TheStreet Ratings. HPQ) was upgraded at Citigroup to buy from sell and given a $32 price target. The company is reaching an inflection point for HP's services, and cost cutting will significantly benefit the second half of 2013, Citi said. Meredith ( MDP) was downgraded at Citigroup to neutral from buy and given a $48 price target. The company's risk-reward has diminished given the run in the stock. Norfolk Southern ( NSC) was downgraded at Deutsche Bank to hold from buy. $83 price target. Valuation call, as the stock has gained 20% year to date, Deutsche said. OpenTable ( OPEN) was initiated with a sell rating and $58 price target at Citigroup. High levels of market penetration will lead to a deceleration of growth, Citi said. Sealed Air ( SEE) was upgraded at J.P. Morgan to overweight from neutral. Necessary culture shift appears to be underway, because of the new management team, J.P. Morgan said.