Wall St. Watchdog reveals information about companies for which stock analysts either upgraded or downgraded the shares in the first week of February:

Upgrades

Magellan Midstream (NYSE:MMP): Reports Q4 revenue $486.9M vs. consensus $433.82M

Morgan Keegan upgraded its rating on this company from Mkt Perform to Outperform and changed its price target to $76.

Advanced Micro (NYSE:AMD): Global semiconductor sales in 2011 hit a record $299.5B, up 0.4% over the previous year, according to SIA and reported in Digitimes.

Longbow upgraded its rating on this company from Neutral to Buy and changed its price target to $10.

HCP (NYSE:HCP):

Stifel Nicolaus upgraded its rating on this company from Hold to Buy and changed its price target to $46.

Brookdale Senior Living (NYSE:BKD):

Stifel Nicolaus upgraded its rating on this company from Hold to Buy and changed its price target to $25.

BMW Group (BAMXY):

HSBC Securities upgraded its rating on this company from Neutral to Overweight.

Downgrades

Newfield Expl (NYSE:NFX):

UBS downgraded its rating on this company from Buy to Neutral and changed its price target from $44 to $41.

ServiceSource Intl (NASDAQ:SREV):

Feltl & Co. downgraded its rating on this company from Buy to Hold and changed its price target from $16 to $17.

Pep Boys (NYSE:PBY):

Argus downgraded its rating on this company from Buy to Hold.

Digital River (NASDAQ:DRIV):

Argus downgraded its rating on this company from Buy to Hold.

SureWest Comm (NASDAQ:SURW):

Stifel Nicolaus downgraded its rating on this company from Buy to Hold.

Senior Housing (NYSE:SNH):

Stifel Nicolaus downgraded its rating on this company from Buy to Hold.

LTC Properties (NYSE:LTC):

Stifel Nicolaus downgraded its rating on this company from Buy to Hold.

Bankrate (NYSE:RATE):

Stifel Nicolaus downgraded its rating on this company from Buy to Hold.

USA Truck (NASDAQ:USAK):

Morgan Keegan downgraded its rating on this company from Outperform to Mkt Perform.

Zoltek (NASDAQ:ZOLT):

Needham downgraded its rating on this company from Hold to Underperform.

Warnaco Group (NYSE:WRC):

Brean Murray downgraded its rating on this company from Buy to Hold.

Urban Outfitters (NASDAQ:URBN):

Brean Murray downgraded its rating on this company from Hold to Sell and changed its price target to $23.

Fossil (NASDAQ:FOSL):

Brean Murray downgraded its rating on this company from Buy to Hold.

Yamana Gold (NYSE:AUY):

Dahlman Rose downgraded its rating on this company from Buy to Hold.

Porsche (POAHY.PK):

HSBC Securities downgraded its rating on this company from Overweight to Neutral.

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To contact the reporter on this story: Derek Hoffman at staff.writers@wallstcheatsheet.com

To contact the editor responsible for this story: Damien Hoffman at editors@wallstcheatsheet.com

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