Analyst upgrades:

• Citigroup upgraded Advanced Micro (NYSE: AMD) to Buy from Hold and raised its target to $5.50 from $4.25 citing valuation and expectations for the company's competitive position and gross margins to improve.
• Barclays upgraded American Express (NYSE: AXP) to Overweight from Equal Weight citing long-term earnings growth as the company benefits from declining charge-offs and credit costs. The firm has a $38 target on the stock.
• JPMorgan upgraded Arch Coal (NYSE: ACI) to Overweight from Neutral and raised its target to $22 from $19 citing the FTC approval for the acquisition of Jacobs Ranch mine and valuation.
• Bebe Stores (NASDAQ: BEBE) was upgraded to Overweight from Equal Weight at Stephens.
• Cheesecake Factory (NASDAQ: CAKE) was upgraded to Neutral from Underweight at Piper Jaffray.
• Ashland (NYSE: ASH) was upgraded to Buy from Hold at KeyBanc.

MOST NOTEWORTHY: Winn-Dixie Stores (WINN), TIB Financial Corp (TIBB), Energy East Corp (EAS), Baidu.com, Inc (BIDU) and SINA Corp (SINA) were today's noteworthy upgrades:

• Friedman Billings upgraded shares of Winn-Dixie Stores (NASDAQ: WINN) to Outperform from Market Perform citing valuation, sustainable Q3 margins, and share gains from both Wal-Mart Stores (WMT) and Publix.

• Sandler raised TIB Financial Corp (NASDAQ: TIBB) off the ground, to Hold from Sell, citing valuation.

• Jefferies upgraded shares of Energy East (NYSE: EAS) to Hold from Sell after Iberdrola agreed to acquire the company.

• Pacific Crest upgraded both Baidu.com (NASDAQ: BIDU) and SINA Corp (NASDAQ: SINA) to Outperform from Sector Perform following their trip to Asia, citing China's strong online ad market. They believe Baidu.com is benefiting from its sales-force integration and SINA Corp's brand strength should lead to further market-share gains...

OTHER UPGRADES:

• Lehman upgraded Celgene Corp (NASDAQ: CELG) and Genzyme Corp (NASDAQ: GENZ) to Overweight from Equal Weight.

• Matrix USA upgraded Jo-Ann Stores (NYSE: JAS) to Sell from Strong Sell.

• Dolby Laboratories (NYSE: DLB) was upgraded to Overweight from Neutral at JP Morgan.

• Wachovia raised U-Store-It Trust (NYSE: YSI) to Market Perform from Underperform.

Analyst summaries provided by TheFlyOnTheWall.com (subscription required).