NEW YORK ( TheStreet) -- CHANGE IN RATINGSAdvanced Micro ( AMD) was downgraded at Goldman Sachs to sell from neutral. $2.50 price target. Market is too enthusiastic about recent gaming design wins, Goldman said. Amazon.com ( AMZN) was initiated with a buy rating at Lazard Capital Markets. $310 price target. Company can expand its margins, Lazard Capital Markets said. Beam ( BEAM) was upgraded to buy from hold at Stifel Nicolaus. $80 price target. Expect a higher possibility of a takeover, Stifel said. CDI ( CDI) was downgraded to hold at TheStreet Ratings. Chesapeake Energy ( CHK) was downgraded at J.P. Morgan to neutral from overweight. Valuation call, as the company lacks near-term catalysts, J.P. Morgan said.
Crane ( CR) was downgraded at Ascendiant to hold from buy. Valuation call, as the stock has gained 30% year to date, Ascendiant said. Computer Sciences ( CSC) was downgraded at Deutsche Bank to hold from buy. $47 price target. Company has fewer margin expansion opportunities, Deutsche said. 3D Systems ( DDD) was downgraded at William Blair to underperform from market perform. Valuation call, as the stock is trading at 45 times expected 2013 earnings, William Blair said.
eBay ( EBAY) was initiated with a buy rating at Lazard Capital Markets. $65 price target. Mobile and Paypal can continue to drive growth, Lazard Capital Markets said. Forum Energy Technologies ( FET) was initiated with a hold rating at TheStreet Ratings. Great Plains ( GXP) was downgraded at J.P. Morgan to neutral from overweight. Less confident about long-term earnings growth, ahead of the next rate case, J.P. Morgan said. Iconix ( ICON) was downgraded at Benchmark to hold from buy. Valuation call, based on a $30 price target, Benchmark said. Lincoln National ( LNC) was downgraded at Credit Suisse to underperform from neutral. Valuation call, based on a $33 price target, Credit Suisse said. Medtronic ( MDT) was downgraded at Credit Suisse to neutral from outperform. Valuation call, based on a $53 price target, Credit Suisse said. Rosetta Resources ( ROSE) was upgraded at Wells Fargo to outperform from market perform. Permian acquisition can drive long-term growth, Wells Fargo said.