Analyst upgrades:

• Thomas Weisel upgraded PerkinElmer (NYSE: PKI) to Overweight from Market Weight on valuation as it sees limited downside to consensus estimates. The firm raised its target on shares to $20 from $18.
• Jefferies upgraded WuXi PharmaTech (NYSE: WX) to Hold from Underperform following the Q2 results as it believes the company's cross-selling strategy is paying off. The firm raised its target on shares to $12 from $5.
• FBR Capital upgraded J. Crew (NYSE: JCG) to Outperform from Market Perform to reflect the company's trend-right product, inventory control, unit growth, and strong management. The firm raised its target on shares to $36 from $25.
• Popular (NASDAQ: BPOP) was upgraded to Buy from Neutral at B. Riley.
• Pan American Silver (NASDAQ: PAAS) was upgraded to Buy from Neutral at UBS.
• HearUSA (AMEX: EAR) was upgraded to Buy from Hold at Roth Capital.

• Citigroup upgraded MEMC Electronic (NYSE: WFR) to Buy from Hold after channel checks indicated solar poly price pressures are easing. The firm added MEMC to its Top Picks Live list and raised its price target on shares to $24 from $15.
  
• FBR Capital upgraded PHH Corp (NYSE: PHH) to Outperform from Market Perform to reflect an improvement in mortgage banking fundamentals and recent management changes at the company. The firm raised its target on shares to $23 from $13.
  
• Deutsche Bank upgraded PerkinElmer (NYSE: PKI) to Hold from Sell on valuation, seeing a balanced risk/reward at current levels. The firm raised its target on shares to $19 from $14.
• Pearson plc (NYSE: PSO) was upgraded to Outperform from Neutral at Credit Suisse.
  
• Dell (NASDAQ: DELL) was upgraded to Conviction Buy from Neutral at Goldman.
  
• Nymagic (NYSE: NYM) was upgraded to Market Perform from Underperform at Keefe Bruyette.

• Citigroup upgraded shares of Consol Energy (NYSE: CNX) to Buy from Hold following the company's lowered guidance as 2009 is fully contracted with a 26% price increase. The firm raised its target to $40 from $38.
  
• Deutsche Bank upgraded AstraZeneca (NYSE: AZN) to Buy from Hold on valuation as it thinks the sell-off on the company's Q4 miss and cautious guidance is overdone.
  
• Wachovia upgraded Boston Scientific (NYSE: BSX) to Outperform from Market Perform because the firm thinks the outlook of the company's two main markets is improving. The firm believes the company's valuation is attractive. Thomas Weisel upgraded Boston Scientific to Overweight from Market Weight citing valuation and improving fundamentals.
• Goldman added MasterCard (NYSE: MA) to the Conviction Buy List.
  
• Accuray (NASDAQ: ARAY) was raised to Buy from Neutral at Piper Jaffray.
  
• KLA-Tencor (NASDAQ: KLAC) was upgraded to Buy from Neutral at Banc of America/Merrill.