NEW YORK (TheStreet) -- RATINGS CHANGES

American International Group (AIG) was downgraded to hold from buy by Deutsche Bank, which cited valuation, based on a 12-month price target of $64.

Avalanche (AAVL) was downgraded to market perform by William Blair, which set a 12-month price target of $24, saying the company had lower secondary efficacy with its Phase II-a trial.

Corning (GLW) was upgraded to outperform by RBC Capital, which set a 12-month price target of $26, saying the company is leveraged to the upcoming 4K television upgrade cycle.

Digital Realty Trust (DLR) was upgraded by TheStreet Ratings team. You can view the full analysis from the report here: DLR Ratings Report.

Laboratory Corp. (LH) was started at overweight by Keybanc, which set a 12-month price target of $143, saying the company is attractively valued, relative to its accelerating growth.

Methode Electronics (MEI) was downgraded to neutral from outperform by Robert Baird, which said the stock has performed well, but to expect growth to decelerate in the coming quarters.

Oaktree Capital (OAK) was upgraded to buy by TheStreet Ratings team. You can view the full analysis from the report here: OAK Ratings Report.

Standard Pacific (SPF) was downgraded to neutral from outperform by Credit Suisse, which set a 12-month price target of $9.50, saying the merger with Ryland Group (RYL) carries high integration risk.

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