Analysts' Actions: AH, CPN, ERTS

NEW YORK ( TheStreet) -- CHANGE IN RATINGS

Accretive Health ( AH) was upgraded from Perform to Outperform at Oppenheimer. $31 price target. Well-positioned to meet or exceed revenue expectations for 2012, Oppenheimer said.

AIMCO ( AIV) was upgraded at UBS from Sell to Neutral. $21 price target. Waning demand trends are priced into shares, UBS said.

Calpine ( CPN) was downgraded at Jefferies from Buy to Hold. $15 price target. Weakened price forecasts for gas and power, Jefferies said.

Electronic Arts ( ERTS) was upgraded at Citigroup from Neutral to Buy. $26 price target. Valuation call, Citigroup said.

McDermott ( MDR) was initiated with a Buy rating at Stifel Nicolaus. $16 price target. Company is seeing a solid pricing environment, Stifel Nicolaus said.

Navistar ( NAV) was upgraded at Goldman Sachs from Sell to Neutral. Valuation call, based on a $38 price target, Goldman said.

Netflix ( NFLX) was downgraded at Wedbush Securities from Neutral to Underperform. $45 price target. Company continues to face higher content costs, Wedbush said.

OneBeacon Insurance ( OB) was upgraded to Buy at TheStreet Ratings.

Rada Electronics Industries ( RADA) was downgraded to Sell at TheStreet Ratings.

Transocean ( RIG) was downgraded at Argus Research from Buy to Hold. Company had a weak November fleet report, and the share raise will dilute earnings, Argus said.

Vulcan Materials ( VMC) was downgraded at Goldman Sachs to Sell. $29 price target. Company could face excess capacity in concrete and asphalt mix, Goldman said. $29 price target.

STOCK COMMENTS / EPS CHANGES

Avago Technologies ( AVGO) numbers were adusted at Citigroup. Shares are now seen reaching $41. Estimates were lowered as industrial creates N/T Rev/GM headwinds, Citigroup said. Buy rating.

Copart ( CPRT) estimates, target were raised at ThinkEquity. Shares are now seen reaching $48. Estimates were also increased, as the company is investing into potential future growth, ThinkEquity said. Hold rating.

Corning ( GLW) estimates were reduced at Morgan Stanley through 2013. Company is seeing lower demand for its gorilla glass, Morgan Stanley said. Equal-weight rating.

Corning estimates, target lowered at UBS. Shares are now seen reaching $17. Estimates were also decreased as Gorilla guided down 25% on weak tablet demand, UBS said. Buy rating.

Corning estimates, target lowered at Citigroup. Shares are now seen reaching $14, according to Citigroup. Estimates also lowered on another negative pre-announcement.

Home Depot ( HD) estimates, target were increased at UBS. Shares are now seen reaching $45. Estimates were also increased on upbeat assessment of both its near-term and longer-term outlooks. Buy rating.

Northeast Utilities ( NU) numbers were increased at UBS. Shares are now seen reaching $35. Estimates were also increased on recent group moves, UBS said. Neutral rating.

Transocean ( RIG) estimates, target were cut at Guggenheim Securities. Shares of RIG are now seen reaching $50. Estimates were also cut, given higher operating costs and dilution from the recent stock offering, Guggenheim said. Neutral rating.

Transocean estimates, target lowered at UBS. Shares are now seen reaching $62. Estimates also lowered as liquidity crunch drives equity deal, UBS said. Buy rating.

Semtech Corporation ( SMTC) estimates were lowered at Oppenheimer through 2013. The overall demand environment remains challenged, Oppenheimer said. Outperform rating.

UnitedHealth Group ( UNH) estimates were raised at UBS through 2012. $58 price target. Commercial outlook appears conservative, UBS said. Buy rating.

UnitedHealth Group numbers were raised at Jefferies. Shares are now seen reaching $60. Estimates were also raised on upbeat investor day, Jefferies said. Buy rating.

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This article was written by a staff member of RealMoney.com.

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