Analyst Upgrades

• Tyson Foods (TSN) to buy from hold at Deutsche Bank.
• Carmike Cinemas (CKEC) to buy from neutral at Merriman.
• Ambow Education (AMBO) to conviction buy from neutral at Goldman.
• Johnson Controls (JCI) to overweight from equal weight at Barclays.
• Dynex Capital (DX) to outperform from market perform at JMP Securities.
• Ensco (ESV) to outperform from neutral at Credit Suisse.
• York Water (YORW) to buy from hold at Brean Murray.
• Mid-America Apartment (MAA) to market perform from underperform at FBR Capital.
• Cheniere Energy Partners (CQP) to hold from sell at Citigroup.
• Forest Oil (FST) to positive from neutral at Susquehanna.
• Tractor Supply (TSCO) to outperform from neutral at RW Baird.

MOST NOTEWORTHY: International Paper, Dynavax Tech and Telecom Italia were today's noteworthy downgrades:

• JP Morgan downgraded International Paper (NYSE: IP) to Neutral from Overweight and said its purchase of Weyerhaeuser's (NYSE: WY) containerboard business will shift the company's focus back to North America and result in a less attractive product mix given increased OCC exposure.
  
• Merriman downgraded shares of Dynavax Tech (NASDAQ: DVAX) to Neutral from Buy after the company's hepatitis B vaccine was placed on clinical hold.
  
• Merrill cut Telecom Italia (NYSE: TI) to Neutral from buy as they expect stronger competition and regulatory measures to cut prices.

OTHER DOWNGRADES:

• Bear Stearns (NYSE: BSC) was downgraded to Neutral from Accumulate at Buckingham.
  
• ViewPoint Financial (NASDAQ: VPFG) was lowered to Market Perform from Outperform at Keefe Bruyette.
  
• Bear downgraded Siemens (NYSE: SI) to Peer Perform from Outperform.