NEW YORK ( TheStreet) -- CHANGE IN RATINGS AthenaHealth ( ATHN) rated new Buy at Sterne Agee. $71 price target. Focus on accretive outcome of a stronger brand and cloud based network. Atmel ( ATML) downgraded at Needham from Buy to Hold, Needham said. Valuation call, as the stock is up 24% year-to-date. Cavium ( CAVM) downgraded at Wunderlich from Hold to Sell, Wunderlich said. $23 price target. Company is facing increased competition, which could cut into near-term growth. Cypress Semiconductor ( CY) downgraded at Needham from Buy to Hold, Needham said. Valuation call, based on a $20 price target. Entergy ( ETR) downgraded at Jefferies to Hold from Buy at Jefferies. $75 price target. Revised assessment of regulatory risk. L.B. Foster ( FSTR) upgraded to buy at TheStreet Ratings. Greenhill ( GHL) downgraded at Ticonderoga from Buy to Neutral, Ticonderoga said. Valuation call. Interpublic Group ( IPG) rated new Underperform at Jefferies. $9 price target. Low organic growth. KLA Tencor ( KLAC) upgraded at Citigroup to Buy from Neutral, Citigroup said. $65 price target. Inspection and metrology targets the sweet spot of escalating foundry capital intensity. Michael Kors ( KORS) rated new Outperform at Baird. $34 price target. Company has substantial growth prospects. Laredo Petroleum ( LPI) rated new Buy at Goldman. $28 price target. Permian basin should drive near-term growth for the company. AllScripts Healthcare Solutions ( MDRX) rated new Buy at Sterne Agee. $24 price target. Leading electronic health record vendor. Novellus Systems ( NVLS) upgraded at Citigroup to Buy from Neutral, Citigroup said. $60 price target. High probability LRCX-NVLS merger goes through mid year. Omnicom Group ( OMC) rated new Hold at Jefferies. $41 price target. Will face challenges given it generates over 80% of sales in US and Europe. Potash ( POT) downgraded at JP Morgan from Overweight to Neutral, JP Morgan said. Valuation call, based on a $48 price target. Pioneer Natural ( PDX) downgraded at Stifel from Buy to Hold, Stifel Nicolaus said. Valuation call. Stock trades at a premium to its peers and there are downside risks to underlying oil prices. Plains Exploration ( PXP) downgraded at Goldman from Buy to Neutral, Goldman Sachs said. Valuation call, as the stock is up 35% over the past three months. $46 price target.