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.

Analyst Upgrades

• Soleil upgraded Community Health (CYH) to buy from hold based on expectations for improved 2011 demand. The firm has a $40 price target on the stock.
• Wunderlich upgraded Invesco Mortgage (IVR) to buy from hold following the company's better-than-expected Q3 dividend. The firm also raised its target price for shares to $23.50 from $21.50.
• Goldman upgraded SuccessFactors (SFSF) to conviction buy from buy, citing cloud exposure.
• Vulcan Materials (VMC) was upgraded to buy from hold at Jefferies.
• Comstock Resources (CRK) was upgraded to buy from neutral at Ladenburg.
• Trimble Navigation (TRMB) was upgraded to buy from hold at Canaccord.

Option traders are pushing up call option prices in the mortgage investment industry as well as pushing up put option prices in the long-term care facilities industry on Monday.

Any time the volatility skews above 1.00, it is an indication that calls are more expensive than puts. Typically, when calls are more expensive than puts, it means the demand for calls is greater than the demand for puts because investors believe the stock is going to rise in the future and they want to take advantage of that movement by buying calls.

Analyst upgrades:

• Keefe Bruyette upgraded Intercontinental Exchange (NYSE: ICE) to Market Perform from Underperform following the company's in-line quarter and extended buyback. The firm raised its target price on shares to $103 from $98.
• Merriman upgraded Cree (NASDAQ: CREE) to Buy from Neutral after transitioning coverage of the stock as it believes HB-LED chips are gaining momentum and that the company can top its recently raised guidance.
• Deutsche Bank upgraded Glatfelter (NYSE: GLT) to Buy from Hold following the company's Q2 results due to falling net debt levels and valuation. The firm raised its target on shares to $14 from $8.
• Corporate Executive Board (NASDAQ: EXBD) was upgraded to Neutral from Underperform at Baird.
• Cognizant (NASDAQ: CTSH) was upgraded to Buy from Neutral at Goldman.
• Unit Corp. (NYSE: UNT) was upgraded to Buy from Sell at Jesup & Lamont.