NEW YORK (TheStreet) -- RATINGS CHANGES

Delhaize Group (DEG) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: DEG Ratings Report.

3M (MMM - Get Report) was downgraded at Langenberg to hold from buy. Valuation call, based on a 12-month price target of $170, Langenberg said.

OM Group (OMG) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: OMG Ratings Report.

Virgin America (VA) was initiated with a buy rating at Deutsche Bank. Twelve-month price target is $44. Company is a niche player that should benefit from industry consolidation, Deutsche Bank said.

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This article was written by a staff member of TheStreet.