Analyst upgrades:

• Deutsche Bank upgraded Blackrock (NYSE: BLK) to Buy from Hold as it believes the BGI acquisition is becoming more accretive with the market rally and that the company's core trends are healthy. The firm raised its target on shares to $230 from $180.
• Citigroup upgraded Burlington Northern (NYSE: BNI) to Hold from Sell as it believes the risk/reward on shares is balanced based on 2010 estimates. Citi raised its target on shares to $89 from $75.
• Auriga upgraded Eclipsys (NASDAQ: ECLP) to Buy from Hold on expectations the company's margin expansion initiatives will drive benefits in 2010 and 2011. The firm raised its target on shares to $24 from $16.
• Seagate (NASDAQ: STX) was upgraded to Overweight from Market Weight at Thomas Weisel and to Buy from Hold at Deutsche Bank.
• Web.com (NASDAQ: WWWW) was upgraded to Outperform from Market Perform at FBR Capital.
• CenturyTel (NYSE: CTL) was upgraded to Overweight from Equal Weight at Morgan Stanley.

Analyst upgrades:

• Cowen upgraded Aaron Rents (NYSE: RNT) to Outperform from Neutral and believes the company's business model is gaining momentum despite the difficult environment. The firm views valuation as attractive.
  
• Citigroup upgraded shares of MedCath (NASDAQ: MDTH) to Hold from Sell on valuation following the recent sell-off. The company's target was lowered to $9 from $19.
  
• Stanford upgraded AeroVironment (NASDAQ: AVAV) to Buy from Hold based on valuation and because they believe its visibility over the next year has improved.
• Chiquita Brands (NYSE: CQB) was lifted to Buy from Hold at BB&T.
  
• Chico's FAS (NYSE: CHS) was upgraded to Neutral from Sell at UBS.
  
• FCStone (NASDAQ: FCSX) was raised to Strong Buy from Outperform at Raymond James.

Analyst downgrades:

• RBC Capital downgraded Clearwire (NASDAQ: CLWR) to Sector Perform from Outperform based on reduced valuation parameters and lack of catalysts. The company's target was lowered to $9 from $15.
• Kellogg (NYSE: K) and Coca-Cola (NYSE: KO) were cut to Neutral from Buy at UBS.
  
• Evergreen Solar (NASDAQ: ESLR) was downgraded at JP Morgan to Underweight from Neutral.
• Deutsche Telekom (NYSE: DT) was downgraded to Neutral from Buy at Goldman and to Hold from Buy at Deutsche Bank.

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

• CarMax Inc. (NYSE: KMX) Q1 profits tumbled despite its aggressive expansion program.
• Chiquita Brands International Inc. (NYSE: CQB) warned it would miss earnings due to cost hikes.
• Circuit City Stores Inc. (NYSE: CC) Q1 loss widened as same-store sales dwindled.
• Commercial Metals Co. (NYSE: CMC) Q3 profits declined despite strong demand, but beat estimates.
• Coventry Healthcare Inc. (NYSE: CVH) lowered its Q2 and full-year outlooks after a disappointing April.
• FedEx Corp. (NYSE: FDX) missed estimates on higher fuel prices and offered lackluster guidance.
• Ford Motor Co. (NYSE: F) warned that 2008 full-year results would be worse than those of 2007.
• General Electric Co. (NYSE: GE) was downgraded by JP Morgan because of risk to earnings.
• J.M. Smucker Co. (NYSE: SJM) missed Q4 earnings expectations despite acquisitions-based growth.
• La-Z-Boy Inc. (NYSE: LZB) said it swung to a Q4 loss due to diminishing retail sales.
• Lehman Brothers Holdings Inc. (NYSE: LEH) CEO expressed his disappointment in the Q2 results.
• Merrill Lynch & Co. (NYSE: MER) profit warnings and write-downs hit the rumor mill.
• Morgan Stanley (NYSE: MS) beat low expectations despite a hefty decline in Q2 profits (see transcript).
• Pier 1 Imports Inc. (NYSE: PIR) narrowed its Q1 loss but still fell short of expectations.
• Winnebago Industries Inc. (NYSE: WGO) posted dismal Q3 results but still beat low expectations.

More earnings highlights from this week: Goldman Sachs, Best Buy, General Mills, Carnival and others

MOST NOTEWORTHY: UBS AG, Coventry Health, Express Scripts and Medco Health were today's noteworthy downgrades:

• Credit Suisse downgraded shares of UBS (NYSE:UBS) to Neutral from Outperform as they believe UBS will have difficulty rebuilding the franchise and do not expect a quick recovery for its private bank unit.
  
• Wachovia downgraded Coventry Health (NYSE:CVH) to Market Perform from Outperform citing concerns regarding visibility around higher than expected inpatient/outpatient costs following reduced 2008 guidance.
  
• UBS downgraded Express Scripts (NASDAQ:ESRX) and Medco Health to Neutral from Buy citing the Pfizer (NYSE:PFE)/Ranbaxy settlement, which reduces the likelihood of a generic Lipitor launch in 2010.

OTHER DOWNGRADES:

• Goldman downgraded ENI SpA (NYSE:E) to Neutral from Buy and removed the stock from the Pan-Europe Conviction Buy List.
  
• Huntsman (NYSE:HUN) was downgraded to Underperform from hold at Jefferies.
  
• Commercial Metals (NYSE:CMC) was cut at Citigroup to Hold from Buy.

MOST NOTEWORTHY: Capstone Turbine, Insulet and Teradata were today's noteworthy initiations:

• Merriman believes Capstone Turbine (NASDAQ: CPST) is well-positioned for rapid growth as capacity constraints and dependence on subsidies drive the adoption of clean, dependable hydrocarbon-based technologies. Shares were assumed with a Buy rating.
  
• JMP Securities initiated Insulet (NASDAQ: PODD) with an Outperform rating and $29 target and expects increased adoption of the company's OmniPod disposable, tubeless insulin pump.
  
• Pacific Crest initiated Teradata (NYSE: TDC) with an Underperform rating. The firm is a seller of shares given the slowing economy and the company's exposure to larger IT deals.

OTHER INITIATIONS:

• Commercial Metals (NYSE: CMC) was initiated at UBS with an Outperform rating and $37 target.

MOST NOTEWORTHY: Polaris Industries, Edwards Lifesciences, BearingPoint and Fortis were today's noteworthy upgrades:

• Rochdale upgraded Polaris Industries (NYSE: PII) to Buy from Hold, as they have increased confidence in the company's ability to achieve estimates.
  
• Piper upgraded shares of Edwards Lifesciences (NYSE: EW) as they believe the bad news is behind the company with a U.S. turnaround expected in 2008.
  
• Jefferies raised shares of BearingPoint (NYSE: BE) to Hold from Underperform on valuation as they believe the risk/reward is neutral following the recent pullback.
  
• Fortis (OTC: FORSY) was upgraded to Outperform from Peer Perform at Bear Stearns. The firm upgraded shares on valuation as they believe the recent weakness is overdone.

OTHER UPGRADES:

• Goldman Sachs added Research in Motion Limited (NASDAQ: RIMM) and Commercial Metals (NYSE: CMC) to its Conviction Buy List.
• Credit Suisse upgraded Varian Semiconductor (NASDAQ: VSEA) to Outperform from Neutral.
  
• Bear upgraded Bruker Biosciences (NASDAQ: BRKR) and Hutchison Telecom (NYSE: HTX) to Outperform from Peer Perform.
  
• Banc of America upgraded Werner Enterprises (NASDAQ: WERN) and J.B. Hunt (NASDAQ: JBHT) to Neutral from Sell.

MOST NOTEWORTHY: Commercial Metals (CMC), KKR Financial (KFN), Career Education (CECO), Ann Taylor (ANN) and Intel (INTC) were today's noteworthy upgrades:

• CIBC upgraded Commercial Metals (NYSE: CMC) to Sector Outperformer from Sector Performer based on valuation.

• KKR Financial (NYSE: KFN) was raised to Outperform from Market Perform at Friedman Billings, following managements detailed conference call and managements prudent and rapid actions to address the sale of its Rambus (RMBS) portfolio.

• Bear Stearns upgraded Career Education (NASDAQ: CECO) to Outperform from Peer Perform based on valuation.

• Ann Taylor (NYSE: ANN) was upgraded to Outperform from Market Perform at Piper Jaffray due to the upside at the company's LOFT division and the firm's belief that there is upside to their 2008/2009 estimates for Ann Taylor.

• Credit Suisse upgraded shares of Intel (NASDAQ: INTC) to Outperform from Underperform based on expected margin expansion, a more benign competitive environment in the MPU sector, better positioning vs. AMD (AMD) at the high-end, and strong demand trends...

OTHER UPGRADES:

• Citigroup upgraded Sovereign Bancorp (NYSE: SOV) to Buy from Hold.

• Network Appliances (NASDAQ: NTAP) was upgraded to Buy from Neutral at Merrill Lynch and Caris raised shares to Buy from Above Average.

• JP Morgan added Continental (NYSE: CAL) to its Focus List. Punk upgraded Washington Mutual (WM) to Buy from Market Perform.

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