Analyst Upgrades

• SINA (SINA) to overweight from neutral at Piper Jaffray.
• Texas Instruments (TXN), ON Semiconductor (ONNN), Xilinx (XLNX) and Valassis (VCI) to overweight from neutral at JPMorgan.
• Salesforce.com (CRM) to buy from hold at Canaccord.
• Peet's Coffee (PEET) to buy from neutral at Janney Capital.
• Invesco Mortgage (IVR) to overweight from equal weight at Barclays.
• BTU International (BTUI) to buy from hold at Wunderlich.
• Coca-Cola Femsa (KOF) to overweight from neutral at HSBC.
• Chipotle (CMG) to market perform from underperform at Morgan Keegan.

MOST NOTEWORTHY: EMC Corp, Emulex, VCG Holding and Conexant were today's noteworthy downgrades:

• Citigroup downgraded shares of EMC Corp (NYSE: EMC) to hold from buy and Emulex (NYSE: ELX) to sell from buy and lowered its targets to $17 from $22 and to $12 from $20, respectively, to reflect their more cautious stance on the storage space after channel checks indicated a broadly softening demand environment, most notably for 'higher ticket' items.
  
• Merriman downgraded shares of VCG Holding (NASDAQ:VCGH) to neutral from buy following the Q4 miss, as they believe acquisitions could slow in the near-term. They prefer to move to the sidelines until the company's outlook improves.
  
• Oppenheimer downgraded Conexant (NASDAQ: CNXT) to perform from outperform as they believe the CEO departure could interrupt the company's turnaround.

OTHER DOWNGRADES:

• Hercules Offshore (NASDAQ: HERO) was cut to hold from buy at Deutsche Bank.
  
• JP Morgan downgraded Blockbuster (NYSE: BBI) to neutral from overweight.
  
• Affymetrix (NASDAQ: AFFX) was downgraded to underperform from peer perform at Bear.

MOST NOTEWORTHY: Red Lion Hotels (RLH), Constellation Energy (CEP), Brinker Int'l (EAT), Nvidia (NVDA) and InfoSpace (INSP) were today's noteworthy upgrades:

• Baird upgraded Red Lion Hotels (NYSE: RLH) to Outperform from Neutral based on valuation, brand expansion progress and takeover potential.

• Constellation Energy (NYSE: CEP) was upgraded to Buy from Hold at Citigroup based on higher cash flow expectations and valuation.

• JP Morgan upgraded Brinker (NYSE: EAT) to Overweight from Neutral, and sees potential upside from slower unit development and a possible Mac Grill sale.

• BMO Capital upgraded Nvidia (NASDAQ: NVDA) to Outperform from Market Perform following a strong second quarter.

• Stanford upgraded InfoSpace (NASDAQ: INSP) to Hold from Sell on valuation; They consider the core online segments looks to be priced into the stock and downside support is given with tax credits and the cash balance...

OTHER UPGRADES:

• Citigroup raised Cox Radio (NYSE: CXR) to Hold from Sell.

• JP Morgan upgraded shares of PepsiAmericas (NYSE: PAS) to Neutral from Underweight.

• Friedman Billings upgraded shares of Emulex (NYSE: ELX) to Outperform from Market Perform.

• DirecTV (NYSE: DTV) was raised to Buy from Hold at Gabelli.

• Seagate (NYSE: STX) was upgraded to Buy from Neutral at Goldman.

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