Analyst upgrades:

• Goldman upgraded SanDisk (NASDAQ: SNDK) to Buy from Neutral and raised their target to $22 from $16 citing the renegotiated royalty agreement with Samsung.
• Goldman also upgraded Starwood Hotels (NYSE: HOT) to Buy from Sell and raised their target to $27 from $11 citing strong operating leverage as RevPAR recovers.
• KeyBanc upgraded Werner Enterprises (NASDAQ: WERN) to Hold from Underweight citing a recent improvement in freight demand.
• J.C. Penney (NYSE: JCP) was upgraded to buy from Underperform at Banc of America/Merrill.
• Savvis (NASDAQ: SVVS) was raised to Outperform from Perform at Oppenheimer.
• Sanofi-Aventis (NYSE: SNY) was upgraded at Citigroup to Buy from Hold.

Analyst upgrades:

• Axys Tech (NASDAQ: AXYS) was upgraded to Outperform from Market Perform at Morgan Keegan on valuation.
  
• Credit Suisse upgraded Cemex (NYSE: CX) to Neutral from Underperform following the company's refinancing announcement.
  
• Patni Computer (NYSE: PTI) was upgraded to Buy from Neutral at UBS.

Analyst downgrades:

• Merriman downgraded Environmental Power (NASDAQ: EPG) to Neutral from Buy citing a lack of visibility into the company's capital raise and lowered their estimates to reflect a slippage in project schedules.
  
• Jefferies cut inVentiv Health (NASDAQ: VTIV) to Hold from Buy as they believe budget cuts at the company's client base make 2009 estimates too high. The firm lowered their target to $11 from $15.
  
• Oppenheimer downgraded RSC Holdings (NYSE: RRR) to Perform from Outperform to reflect the continued deterioration in non-residential construction and valuation following the recent rally.
• Smurfit-Stone (NASDAQ: SSCC) was lowered to Hold from Buy at Deutsche Bank.
  
• Distribucion Y Servicio (NYSE: DYS) was downgraded to Sell from Hold at Deutsche Bank.
  
• Key Energy (NYSE: KEG) was downgraded at SMH Capital to Neutral from Accumulate.

Analyst initiations:

• AECOM Technology (NYSE: ACM) was initiated with an Outperform rating and $34 target at Baird. The firm is positive on AECOM's diverse portfolio of services and global reach.
  
• Baird also initiated Checkpoint (NYSE: CKP) with a Neutral rating and $11 target, citing the weak macro environment.
  
• Thomas Weisel said Integra LifeSciences (NASDAQ: IART) has little exposure to economically sensitive areas of healthcare and has a varied mix of products that provide a platform for sustainable organic growth. Shares were initiated with an Overweight rating.
• Piper Jaffray assumed CBS Corp (NYSE: CBS) with a Neutral rating.
  
• BioMarin (NASDAQ: BMRN) was started at Stanford with a Hold rating.
  
• Websense (NASDAQ: WBSN) was initiated with an Equal Weight at First Analysis.

Analyst upgrades:

• Citigroup upgraded shares of Ball (NYSE: BLL) to Buy from Hold and raised its target to $45 from $41 as they believe recent capacity closures will be positive for beverage can operating rates.
  
• Deutsche Bank upgraded Rio Tinto (NYSE: RTP) to Buy from Hold on valuation and the company's plans to preserve cash.
• ThinkPanmure upgraded Intel (NASDAQ: INTC) to Accumulate from Sell and raised its target to $17 from $12 citing trough earnings in 2009 and lowered expectations.
• Viacom B (NYSE: VIA.B) was added to Goldman's Conviction Buy List.
  
• Telefonica (NYSE: TEF) was upgraded to Outperform from Neutral at Credit Suisse.
  
• Onyx Pharma (NASDAQ: ONXX) was raised to Overweight from Neutral at JP Morgan.

Analyst downgrades:

MOST NOTEWORTHY: Genzyme, Dean Foods and Key Energy Services were today's noteworthy upgrades:

• Citigroup upgraded shares of Genzyme (NASDAQ: GENZ) to Buy from Hold as it sees EPS upside in 2008 and 2009 from the company's three upcoming product launches and improving operating margins. Citigroup raised its target to $91 from $80.
  
• JP Morgan upgraded Dean Foods (NYSE: DF) to Overweight from Neutral citing valuation and expectations for dairy costs to decline.
  
• Banc of America upgraded shares of Key Energy Services (NYSE: KEG) to Buy from Neutral to reflect the company's increasing pricing power and projected margin expansion for well services and growth opportunities in the shale plays. The firm raised its target price to $22 from $18.

OTHER UPGRADES:

• Domtar (NYSE: UFS) was raised to Outperform from Sector Perform at RBC Capital.
  
• Gladstone (NASDAQ: GOOD) was upgraded to Outperform from Neutral at Baird.
  
• JP Morgan upgraded Macy's (NYSE: M) to Neutral from Underweight.
  
• Goldman upgraded Rexam (OTC: REXMY) to Buy from Neutral.