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:

• Deutsche Bank upgraded Cemex (NYSE: CX) to Buy from Hold on decreased dilution risk following the company's successful refinancing and raised its target on shares to $15 from $11.20.
• Rochdale upgraded Wal-Mart (NYSE: WMT) to Buy from Neutral and raised its target to $65. The firm is positive on Wal-Mart's defensive characteristics, cyclical upside, and competitive position.
• JPMorgan upgraded Gartner Group (NYSE: IT) to Overweight from Neutral to reflect stabilization in IT industry spending and the stock's attractive valuation. The firm has a $23 price target on the stock.
• Cavium Networks (NASDAQ: CAVM) was upgraded to Overweight from Equal Weight at Barclays.
• Borg-Warner (NYSE: BWA) was upgraded to Buy from Neutral at BofA/Merrill.
• Nanometrics (NASDAQ: NANO) was upgraded to Outperform from Perform at Oppenheimer.

Here are some highlights from this past week's earnings coverage from BloggingStocks:

• American Eagle Outfitters Inc. (NYSE: AEO) reported better-than-expected Q1 earnings, lifting shares.
• AutoZone Inc. (NYSE: AZO) posted a better-than-expected Q3 profit said it will continue to buy back shares.
• Bank of Montreal (NYSE: BMO) reported lower Q2 earnings and also announced 1,100 layoffs.
• Big Lots Inc. (NYSE: BIG) higher Q1 earnings topped estimates even though same-store sales fell.
• BioMed Realty Trust Inc. (NYSE: BMR) earnings prospects after the recent capital raise led to a downgrade.

Analyst upgrades:

• Kaufman Bros. assumed coverage of Ctrip.com (NASDAQ: CTRP) and upgraded the stock to Buy from its previous Hold rating. The firm thinks the company's Q2 targets are achievable while 20%-plus growth should return in Q3 as comps ease.
• Janney Montgomery upgraded Cogdell Spencer (NYSE: CSA) to Neutral from Sell as it believes last night's capital raise removes risk. The firm has a $4.50 target on shares.
• Deutsche Bank upgraded Map Pharmaceuticals (NASDAQ: MAPP) to Buy from Hold following the positive Levadex Phase 3 results as it believes the migraine drug could generate peak sales of $250M in the U.S. if approved. Deutsche raised its target on shares to $12 from $5.
• Northwest Natural Gas (NYSE: NWN) was raised to Buy from Neutral at UBS.
• Petro-Canada (NYSE: PCZ) was upgraded to Overweight from Equal Weight at Barclays.
• Alcatel-Lucent (NYSE: ALU) was upgraded to Add from Reduce at WestLB.

Analyst upgrades:

• JP Morgan upgraded Alcoa (NYSE: AA) to Overweight from Neutral and added shares to its Focus List. The analyst said the equity offering and dividend cut provide enough "liquidity insurance" to make it through 2009 and now views risk/reward as attractive.
  
• Deutsche Bank upgraded Asbury Automotive (NYSE: ABG) to Buy from Hold as it finds the current valuation attractive and thinks the company's cost savings will drive upside in a recovery. The firm raised its target price to $7 from $5.50.
  
• Barclays upgraded Beckman Coulter (NYSE: BEC) to Overweight from Equal Weight. Following their healthcare conference and management meetings, the firm sees increased visibility into revenues.
• Waddell & Reed (NYSE: WDR) was raised to Buy from Neutral at Goldman.
  
• Nokia (NYSE: NOK) was upgraded to Outperform from Neutral at Credit Suisse.
  
• Brocade (NASDAQ: BRCD) was lifted to Outperform from Sector Perform at RBC Capital.

MOST NOTEWORTHY: Universal Electronics, BioMed Realty Trust and Allied Healthcare were today's noteworthy downgrades:

• Deutsche Bank downgraded Universal Electronics (NASDAQ: UEIC) to Hold from Buy following the company's disappointing guidance.
  
• Baird downgraded shares of BioMed Realty Trust (NYSE: BMR) to Neutral from Outperform and lowered their target to $26 as they believe shares are fairly valued.
  
• Allied Healthcare (NASDAQ: AHCI) was cut to Market Perform from Outperform at Friedman Billings following the lower-than-expected Q1 results.

OTHER DOWNGRADES:

• Merrill Lynch downgraded Fannie Mae (NYSE: FNM) and Freddie Mac (NYSE: FRE) to Sell from Neutral.
  
• Best Buy (NYSE: BBY) was cut to Underweight from Equal Weight at Morgan Stanley.
  
• Vital Images (NASDAQ: VTAL) was downgraded to Hold from Buy at Deutsche Bank.