Analyst Upgrades

• Polo Ralph Lauren (RL) to neutral from underperform at BofA/Merrill.
• Sigma-Aldrich (SIAL) to outperform from market perform at Leerink.
• Petrobras (PBR) to overweight from equal weight at Barclays.
• Silvercorp Metals (SVM) to buy from neutral at UBS.
• PROS (PRO) to buy from hold at Jefferies.
• Power Integrations (POWI) and Monolithic Power (MPWR) to buy from neutral at Roth Capital.
• Diodes (DIOD) to outperform from neutral at RW Baird.
• Whole Foods (WFMI) to hold from sell at Hapoalim.
• Sinclair Broadcast (SBGI) to overweight from neutral at JPMorgan.
• Sappi (SPP) to outperform from neutral at Macquarie.
• Alpha Natural (ANR) to buy from hold at BB&T.
• Watts Water (WTS) to buy from hold at Brean Murray.

MOST NOTEWORTHY: Cisco Systems (CSCO), Finisar Corp (FNSR), Tenet Healthcare (THC), Best Buy (BBY) and Cascade Corp (CAE) were today's noteworthy upgrades:

• Bear Stearns upgraded shares of Cisco Systems (NASDAQ: CSCO) to Outperform from Peer Perform, with a $36 target, after the quarterly results as they believe revenue growth is sustainable and diversified. Bear expects Cisco to benefit from significant new product cycles over the next two years and believes investments in emerging markets are beginning to pay off.
  

• Merriman upgraded Finisar (NASDAQ: FNSR) to Buy from Neutral to reflect the improved outlook at their top customer, Cisco.

• Tenet Healthcare (NYSE: THC) was upgraded to Hold from Sell at Stifel, as the firm expects shares to remain range bound.

• Pali Capital raised shares of Best Buy (NYSE: BBY) to Buy from Neutral with a $55 target on valuation as they believe the bad news is already priced in.

• Cascade (NYSE: CAE) was upgraded to Market Perform from Underperform at Rodman & Renshaw on valuation.

OTHER UPGRADES:

• Warner Music (NYSE: WMG) was upgraded to Buy from Sell with a $13 target at Citigroup.

• Citigroup also upgraded shares of Copa Holdings (NYSE: CPA) to Buy from Hold with a $71 target.

• Baird upgraded shares of Parkway Properties (NYSE: PKY) to Outperform from Neutral on valuation.

• Computer Sciences (NYSE: CSC) was raised to Hold from Underperform at Jefferies on valuation and improvement in bookings.

• Morgan Stanley upgraded ABB Ltd (NYSE: ABB) to Overweight from Equal Weight.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).

MOST NOTEWORTHY: Today's noteworthy downgrades involved Hilton Hotels Corp (HLT), TransAlta Corp (TAC), Cascade Corp (CAE), Activison (ATVI) and Atheros Communications (ATHR):

• Stifel downgraded Hilton Hotels (NYSE: HLT) to Hold from Buy at Stifel based on the recent acquisition.

• TD Newcrest cut TransAlta (NYSE: TAC) to Sell from Hold and doesn't consider an LBO of the company likely.

• Rodman cut Cascade (NYSE: CAE) to Market Underperform from Market Perform based on valuation.

• Activision (NASDAQ: ATVI) was downgraded to Neutral from Outperform at JP Morgan based on valuation and the competitive environment.

• AG Edwards believes Atheros Communications (NASDAQ: ATHR) has a less favorable risk/reward and cut shares to Hold from Buy...

OTHER DOWNGRADES:

• Needham downgraded Kyphon (NASDAQ: KYPH) to Buy from Strong Buy.

• UBS downgraded Taiwan Semiconductor (NYSE: TSM) to Neutral from Buy.

• Deutsche Bank cut Chicago Mercantile Exchange Holdings (NYSE: CME) to Hold from Buy.

• Roche Holding Ltd (OTC: RHHBY) was downgraded to Hold from Buy at Citigroup.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).