NEW YORK ( TheStreet) -- CHANGE IN RATINGS Analog Devices ( ADI) was upgraded at Jefferies to buy. $56 price target. Company should continue to return the majority of its cash to shareholders in the coming years, Jefferies said. Adtran ( ADTN) was upgraded at Goldman Sachs to buy from neutral. $28 price target. Company should benefit from a multiyear upgrade cycle, Goldman said. Advanced Micro ( AMD) was upgraded to buy from underperform at Bank of America/Merrill Lynch. $6 price target. Estimates were also increased, as the company is gaining market share with consoles. Advanced Micro was upgraded at Canaccord Genuity to buy from hold. $5 price target. Ramp in the embedded business should continue to accelerate, Canaccord Genuity said. On Assignment ( ASGN) was downgraded at Deutsche Bank to hold from buy. Valuation call, based on a $29 price target, Deutsche Bank said. CNQR) was initiated with a neutral rating at J.P. Morgan. Valuation call, based on an $80 price target, J.P. Morgan said. China Cord Blood ( CO) was upgraded to buy at TheStreet Ratings. Community Health ( CYH) was initiated with a buy rating at Keybanc. $58 price target. Company has a solid track record and should receive above-average benefits from health care reform, Keybanc said. Sourcefire ( FIRE) was downgraded at UBS to neutral from buy based on valuation. Price target is $62. FNSR) was upgraded at Needham to strong buy from buy. $22 price target. Management meetings suggest that positioning and visibility are improving, Needham said. Hess ( HES) was upgraded at J.P. Morgan to overweight from neutral. $84 price target. Asset sale program can help unlock value, J.P. Morgan said. Health Management ( HMA) was downgraded at Credit Suisse to neutral from outperform. Valuation call, based on a $16 price target, Credit Suisse said. Jive Software ( JIVE) was downgraded at UBS to neutral from buy. Valuation and sluggish demand for enterprise software, said UBS. Price target is $19. KB Home ( KBH) was upgraded at CRT Capital to buy from hold. $23 price target. Earnings are coming in well ahead of expectations, CRT Capital said. Lamar ( LAMR) was upgraded at Citigroup to buy from neutral. The IRS is expected to rule in favor of the REIT transition, said Citigroup. Price target goes to $53.