• 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.

• 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.

• 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

• Janney Montgomery upgraded Dreamworks (DWA) to buy from neutral on valuation and believes Dragon will be a major hit. The firm has a $45 target on the stock.
• Thomas Weisel upgraded Gildan Activewear (GIL) to market weight from underweight, citing expectations for increased market shares in the U.S. screen print channel. The firm raised its target to $17 from $12.
• P.F. Chang's (PFCB) was upgraded to overweight from equal weight at Morgan Stanley.
• PEPCO Holdings (POM) was upgraded to outperform from neutral at Credit Suisse.
• Arris (ARRS) was upgraded to buy from neutral at UBS.