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.

• 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.

• 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.

Its location among the mid Atlantic states has made New Jersey a transportation hub, a manufacturing and commerce center, and a source of plenty of investment opportunities. Twenty-four Fortune 500 companies are headquartered there. And four companies from New Jersey made Fortune's 2007 list of the fastest growing companies in the U.S.: Cognizant Technology Solutions (NASDAQ: CTSH), Celgene Corp. (NASDAQ: CELG), inVentiv Health Inc. (NASDAQ: VTIV), and Jackson Hewitt Tax Service Inc. (NYSE: JTX).

Cognizant has been on Fortune's list of fastest growing companies for the past five years. This Teaneck-based member of the S&P 500 is a global IT services firm with clients in the health care, financial services, and manufacturing industries. Cognizant's three-year annual revenue growth rate was 56 percent; its three-year annual earnings per share growth rate was 55 percent. The consensus of analysts surveyed by Thomson Financial is that Cognizant is a buy, and the company has beat Wall Street expectations for the past four quarters. The share price of $85.79 at close on Friday is up from the 52-week low of $67.60 in September. The price has risen since Cognizant announced a stock split and share repurchase program in September, and the Motley Fool has since dubbed Cognizant a hypergrowth stock.

Summit-based Celgene is a biopharmaceuticals firm involved in cancer treatment and stem cell research. Its three-year annual revenue growth rate was 48 percent; its three-year annual earnings per share growth rate was 33 percent. The consensus of analysts surveyed by Thomson Financial is that Celgene is a buy. The share price reached a 52-week high of $72.91 on Friday. The Motley Fool recognized Celgene for its sustainable competitive advantage over its rivals, and Jim Cramer also likes Celgene.