Analyst upgrades:

• Merriman upgraded Sunpower (NASDAQ: SPWRA) two levels to Buy from Sell after transitioning coverage. The firm believes Sunpower is emerging from the current recession as the CleanTech leader and has a $38-$48 price range on shares.
• Citigroup upgraded Varian Medical (NYSE: VAR) to Buy from hold as it believes capex pressure and health care reform uncertainty is priced into shares, and demand will return as hospital budgets stabilize. Citi raised its target on shares to $45 from $36.
• FBR Capital upgraded Gap (NYSE: GPS) to Outperform from Market Perform following the Q2 results to reflect product improvement and ongoing inventory control. The firm raised its target on shares to $24 from $18.
• Schnitzer Steel (NASDAQ: SCHN) was upgraded to Neutral from Sell at UBS.
• UDR Inc. (NYSE: UDR) was upgraded to Market Perform from Underperform at Wells Fargo.
• The Buckle (NYSE: BKE) was upgraded to Buy from Hold at Roth Capital.

MOST NOTEWORTHY: VMWare, Validus Holdings and Hologic were today's noteworthy initiations:

• VMWare Inc (NYSE: VMW) was initiated by a host of firms: Banc of America believes the current valuation captures most of the upside potential, and started shares with a Neutral rating and $75 target. Wachovia started shares with a Market Perform rating and Deutsche Bank started shares with a Hold rating and $80 target on valuation. The stock was also started with a Buy rating and $92 target at UBS, with a Buy rating and $100 target at Citigroup and with an Overweight rating at JP Morgan and with a Neutral rating at Merrill Lynch.
  
• Validus Holdings (NYSE: VR) was started with a Buy rating and $29 target at UBS on valuation and benefits from the Talbots (NYSE: TLB) acquisition. Shares were also initiated at JP Morgan with a Neutral rating.
  
• CIBC resumed coverage of Hologic Inc (NASDAQ: HOLX) with a Sector Outperformer rating and $77 target as the firm is positive on Hologic's merger with Cytyc Corporation (NASDAQ: CYTC) and views it as one of the top mid-cap stories in the coming year.

OTHER INITIATIONS:

• B. Riley initiated shares of EuroBancshares (NASDAQ: EUBK) with a Buy rating and $10 target.
  
• Rodman resumed coverage of Ziopharm Oncology Inc (NASDAQ: ZIOP) with a Market Outperform rating and $8 target.
  
• Citigroup started shares of Timken Company (NYSE: TKR) with a Buy rating and $43 target.
  
• MercadoLibre Inc (NASDAQ: MELI) was initiated with a Sector Perform rating and $39 target at RBC Capital.