UPGRADES:
Stifel Nicolaus upgraded shares of CSX Corp. (NYSE: CSX) from Hold to Buy. The analyst also set a $51 price target on the stock.

Morgan Stanley upgrades UnitedHealth Group (NYSE: UNH) from Equalweight to Overweight. Price target $33.

Stephens & Co upgrades Dean Foods (NYSE: DF) from Equalweight to Overweight, sets price target of $20. Stifel Nicolaus also upgraded Dean Foods from Hold to Buy, and set a price target $20.

Jefferies & Co upgrades Tenaris S.A. (NYSE: TS) from Hold to Buy. Price target increased from $30 to $44.

For daily real-time Upgrades go to http://www.streetinsider.com/Upgrades

DOWNGRADES:
Wedbush