Analyst upgrades:

• ThinkEquity upgraded Yahoo! (YHOO) to Buy from Hold based on valuation, checks that indicate Q2 display/search improvement, search stabilization, improved cost structure, and share repurchases.
• Societe Generale upgraded Roche Holding (RHHBY) to Buy from Hold based on expectations Avastin will be approved in breast cancer, despite negative FDA briefing documents.
• FBR Capital upgraded Atheros (ATHR) to Outperform from Market Perform based on valuation and positive checks that indicate powerline networking chips are gaining traction in China. The firm has a $43 price target on the stock.
• Juniper (JNPR) was upgraded to Buy from Hold at Canaccord.
• Ultimate Software (ULTI) was upgraded to Buy from Hold at Roth Capital.
• Liberty Property Trust (LRY) was upgraded to Market Perform at Wells Fargo.

Analyst downgrades:

• Auriga downgraded ADC Telecomm (ADCT) to Hold from Buy following the company's merger announcement with Tyco Electronics (TEL).
• TD Newcrest expects Manulife's (MFC) Q2 loss to be worse than expected due to the impact from lower interest rates. The firm cut shares to Hold from Buy.
• Goldman downgraded Perrigo (PRGO) to Sell from Neutral and lowered its target to $50 from $61. The firm cites relative valuation for the downgrade. Target to $50 from $61.
• F5 Networks (FFIV) was downgraded to Hold from Buy at Canaccord.
• Anglo American (AAUKY) and BHP Billiton (BHP) were downgraded to Neutral from Outperform at Credit Suisse.

Analyst initiations:

• QKL Stores (QKLS) was initiated with a Buy rating and $7 price target at Global Hunter.
• Rodman & Renshaw started Rick's Cabaret (RICK) with an Outperform rating.

Analyst upgrades:

• Stephens upgraded Quidel (QDEL) to equal weight from underweight on valuation following the recent pullback in shares. The firm keeps a $16 price target on the stock.
• UBS upgraded Clearwire (CLWR) to neutral from sell, citing the company's funding, which increases opportunities. The firm raised its price target to $6 from $3.
• Oppenheimer upgraded Mattson Technology (MTSN) to outperform from perform on expectations the company will benefit from a cyclical recovery in memory capex spending in 2010. The firm raised its target on shares to $4 from $3.
• Eli Lilly (LLY) was upgraded to sell from conviction sell at Goldman.
• Kinross Gold (KGC) was upgraded to overweight from neutral at JPMorgan.
• Limited Brands (LTD) was upgraded to hold from sell at Soleil.

Analyst upgrades:

• Jefferies upgraded Autodesk (NASDAQ: ADSK) to Buy from Hold after the firm's channel checks indicated the company's business is stabilizing. Jefferies raised its target on shares to $27 from $20.
• Citigroup upgraded Veeco (NASDAQ: VECO) to Buy from Hold on expectations LED order momentum will continue and cost discipline will help margin leverage. Citi raised its target on shares to $24 from $8.
• Deutsche Bank upgraded Domtar (NYSE: UFS) to Buy from Hold on expectations earnings will improve meaningfully over the next year. The firm keeps a $24 price target on the stock.
• Varian (NASDAQ: VARI) was upgraded to Equal Weight from Underweight at Barclays.
• Air Products (NYSE: APD) was upgraded to Overweight from Neutral at JPMorgan.
• U.S. Steel (NYSE: X) was upgraded to Buy from Neutral at Goldman.

Analyst upgrades:

• UBS upgraded Target (NYSE: TGT) to Buy from Neutral and raised its price target to $52 from $45 citing reduced inventories, some credit stability, and an improved back-to-school period.
• Credit Suisse said concerns regarding Safeway's (NYSE: SWY) price position are overblown and that earnings risk is limited. The firm upgraded shares to Outperform from Neutral and raised the target price to $25 from $22.
• Oppenheimer upgraded Canadian Solar (NASDAQ: CSIQ) to Outperform from Perform as it believes the story is underappreciated following the recent sector rally. The firm has a $14 price target on the stock.
• CME Group (NASDAQ: CME) was upgraded to buy from Neutral at Goldman.
• Freeport McMoRan (NYSE: FCX) was upgraded to Overweight from Neutral at JP Morgan.
• Gilead Sciences (NASDAQ: GILD) was upgraded to Buy from Neutral at FTN Equity.

Analyst upgrades:

• ING upgraded Roche (OTC: RHHBY) to Buy from Hold as it believes Roche will not pay more than $100/share for Genentech (NYSE: DNA) and that the Avastin adjuvant data due April 2009 provides significant upside potential.
  
• Oppenheimer upgraded Motorola (NYSE: MOT) to Outperform from Perform on valuation as it believes sentiment is at an all-time low and the stock has limited downside. The firm set a $5 target on shares.
  
• Morgan Stanley upgraded Comerica (NYSE: CMA) to Equal Weight from Underweight citing valuation that adequately reflects credit deterioration in its commercial-heavy loan portfolio and aggressive government action.
• Cheesecake Factory (NASDAQ: CAKE) and Nucor (NYSE: NUE) were upgraded to Buy from Neutral at Goldman.
  
• Pinnacle Entertainment (NYSE: PNK) was raised to Overweight from Equal Weight at Barclays.

MOST NOTEWORTHY: Pericom, St. Jude Medical and CDC Corp were today's noteworthy initiations:

• B. Riley believes Pericom (NASDAQ: PSEM) is in the early stages of a product cycle-driven growth and feels shares are significantly undervalued at current levels. The firm started shares with a Buy rating and $18 target.
  
• Rodman & Renshaw started St. Jude Medical (NYSE: STJ) with a Market Outperform rating and $50 target. The firm is positive on St. Jude's recent investments in its CRM product portfolio and sales organization, which should increase competitiveness and facilitates continued market share gains.
  
• CDC Corp (NASDAQ: CHINA) was initiated at Cantor with a Buy rating and $6 target, as they believe the stock is significantly undervalued due to the complexity of the company's corporate structure and poor financial disclosure. The firm believes this gap will close after the company lists at least one of its subsidiaries this year.

OTHER INITIATIONS:

• Kevin Dann initiated Orion Marine Group (NASDAQ: OMGI) with a Buy rating and $18 target.
  
• JP Morgan initiated Chimera Investment (NYSE: CIM) with a Neutral rating.
  
• Credit Suisse started Perrigo Company (NASDAQ: PRGO) with a Neutral rating and $40 target.