Analyst upgrades:

• Roth Capital upgraded MicroStrategy (NASDAQ: MSTR) to Buy from Hold and raised its target to $90 from $70, citing encouraging Q2 results, new product cycle catalysts, a lift from Europe, and cost reductions.
• William Blair upgraded Costco (NASDAQ: COST) to Outperform from Market Perform after meeting with management as it believes sales and earnings could beat expectations over the next year.
• Credit Suisse upgraded Novellus (NASDAQ: NVLS) to Outperform from Neutral and raised its target to $29 from $23. The firm cites higher Samsung capex forecast, high leverage, and low expectations.
• Home Properties (NYSE: HME) and Equity Residential (NYSE: EQR) were upgraded to Outperform from Market Perform at FBC Capital, while Douglas Emmett (NYSE: DEI) and Duke Realty (NYSE: DRE) were raised to Market Perform from Underperform.
• Agilent (NYSE: A) was upgraded to Overweight from Equal Weight at Barclays.
• Cytec Industries (NYSE: CYT) was upgraded to Buy from Hold at KeyBanc.

Analyst upgrades:

• Barclays upgraded Spectra Energy (NYSE: SE) to Overweight from Equal Weight. The firm believes Spectra's valuation is attractive and that the dividend is secure.
• Soleil upgraded Sunoco (NYSE: SUN) to Buy from Hold on valuation following the recent pullback and maintains a $45 target on the stock.
  
• Friedman Billings upgraded O'Reilly Automotive (NASDAQ: ORLY) to Outperform from Underperform on valuation and the company's better than expected sales and earnings acceleration. The firm has a $38 target on the stock.
• Royal Caribbean (NYSE: RCL) was removed from Goldman's Conviction Sell List.
  
• Intercontinental Hotels (NYSE: IHG) was raised to Buy from Hold at Jefferies.
  
• Valspar (NYSE: VAL) was lifted to Neutral from Underweight at JP Morgan.

MOST NOTEWORTHY: ComScore, Duke Realty, Nordstrom and Sun Healthcare were among today's noteworthy upgrades:

• ComScore (NASDAQ: SCOR) was upgraded to Outperform from Perform at Oppenheimer to reflect the strong Q1 report and strong customer additions.
  
• Duke Realty (NYSE: DRE) was upgraded to Outperform from Market Perform at Wachovia upgraded based on valuation.
  
• Nordstrom (NYSE: JWN) was upgraded to Outperform from Neutral at Credit Suisse.
  
• Sun Healthcare (NASDAQ: SUNH) was upgraded to Outperform from Market Perform at Friedman Billings based on valuation and notes the Medicare rate cuts will be as drastic as feared.

OTHER UPGRADES:

• MedAssets (NASDAQ: MDAS) was upgraded to Buy from Neutral at Piper, which thinks the company's acquisition of Accuro will strengthen its revenue cycle management offering, and the firm believes the tight credit markets make the company's MedAssets a compelling product in the short-term. In addition, Piper notes that the company has recently had success with large hospital systems.
  
• Jones Apparel (NYSE: JNY) was upgraded to Buy from Neutral at Merrill citing sales expectations for the l.e.i. brand at Wal-Mart (NYSE: WMT) and margin improvements from leaner inventories.
  
• Affiliated Computer (NYSE: ACS) was upgraded to Buy from Hold at Jefferies based on valuation and expectations for better bookings.