• Jefferies upgraded shares of Clearwire Corporation (NASDAQ: CLWR) to Buy from Hold on valuation as they believe the stock is trading as if the Sprint Nextel Corporation (NYSE: S) deal is off. Jefferies thinks the Sprint/Clearwire deal is still in the best interest of both companies.
  
• Deutsche Bank upgraded shares of Citrix Systems (NASDAQ: CTXS) to Buy from Hold, as they believe the contribution from XenSource beginning in Q4 could be better than expected.
  
• UBS upgraded shares of Altria Group (NYSE: MO) citing stronger Q3 International results and potential share repurchases. Shares were upgraded to Buy from Neutral.
  
• Piper Jaffray raised shares of Overstock.com (NASDAQ: OSTK) to Market Perform from Underperform, as they are incrementally more positive on shares following the company's Q3 upside. They believe the company has turned the corner on profitability.
  
• Bear Stearns upgraded shares of Interpublic Group (NYSE: IPG) to Outperform from Peer Perform on valuation and expectations for improved performance in 2008.

• Morgan Stanley upgraded Walgreen (NYSE: WAG) to Overweight from Equal Weight.
  
• Friedman Billings raised its rating on IMS Health (NYSE: RX) to Outperform from Market Perform.
  
• JP Morgan upgraded Stericycle (NASDAQ: SRCL) to Overweight from Neutral.
  
• Citigroup upgraded Xerox Corporation (NYSE: XRX) to Hold from Sell.
  
• RadiSys Corporation (NASDAQ: RSYS) was upgraded to Buy from Hold at Cantor.

Analyst upgrades: CLWR, CTXS, MO, OSTK and IPG originally appeared on BloggingStocks on Mon, 22 Oct 2007 10:33:00 EST. Please see our terms for use of feeds.