Analyst upgrades:

• Credit Suisse upgraded shares of Novartis (NYSE: NVS) to Neutral from Underperform as they believe the stock's defensive characteristics justify a premium valuation.
  
• Merrill raised Dreamworks (NYSE: DWA) to Buy from Neutral and has increased confidence in DWA's sustainable success following the performance of Kung Fu Panda and new revenue streams.
  
• Anadarko Petroleum (NYSE: APC) was raised to Buy from Hold at Stanford on valuation.
  
• Goldman upgraded Smurfit-Stone (NASDAQ: SSCC) and Canadian National (NYSE: CNI) to Buy from Neutral and added International Paper (NYSE: IP) to the Conviction Buy List.
  
• Northern Trust (NASDAQ: NTRS) was upgraded to Buy from Neutral at Merrill.

• Jefferies downgraded shares of Savvis (NASDAQ: SVVS) to Hold from Buy and lowered the target to $17 from $20 to reflect decreasing visibility from economic headwinds and expectations for increased capex.
  
• Citigroup downgraded Regions Financial (NYSE: RF) to Sell from Hold as they believe fundamentals are not in-line with the current valuation following the recent rally.
  
• Merrill lowered their General Electric (NYSE: GE) estimates below consensus and downgraded shares to Neutral from Buy citing increased fundamental pressures on the company's GE Capital unit. GE's target was cut to $28 from $37.50.

MOST NOTEWORTHY: SonicWALL, DG FastChannel and Thomson Reuters were today's noteworthy initiations:

• B. Riley believes SonicWALL's (NASDAQ: SNWL) long-term outlook should benefit as the company specifically targets the SMB IT security market and is increasing its focus on the Asian and Latin American markets. Shares were initiated with a Buy rating and $14 target.
  
• Merriman started DG FastChannel (NASDAQ: DGIT) with a Buy rating and believes the recent closing of the Vyvx acquisition and anticipated closing of the Enliven acquisition could create positive catalysts for the stock.
  
• Citigroup assumed Thomson Reuters (NASDAQ: TRIN) with a Hold rating. The firm finds the valuation full at current levels and prefers to wait for a better entry point.

OTHER INITIATIONS:

• Ameristar Casinos (NASDAQ: ASCA) was initiated with an Overweight rating and $26 target at Thomas Weisel.
  
• William Blair assumed Intuitive Surgical (NASDAQ: ISRG) with an Outperform rating.
  
• Longtop Financial (NYSE: LFT) was started at Oppenheimer with an Outperform rating and $25 target.