Analyst upgrades:

• Thomas Weisel upgraded SanDisk (NASDAQ: SNDK) to Overweight from Market Weight due to accelerating manufacturing cost declines, potential NAND flash sourcing upside at Toshiba (OTC: TOSBF) and Samsung and an increase in 2H09 demand.
  
• Oppenheimer upgraded Quality Systems (NASDAQ: QSII) to Perform from Underperform to reflect potential benefits from the stimulus package and channel checks that indicated IT budgets are stabilizing. The firm raised its target price on shares to $54 from $40.
  
• RBC Capital upgraded OSI Pharmaceuticals (NASDAQ: OSIP) to Outperform from Sector Perform following positive Tarceva survey results and cites valuation.
• Marriott (NYSE: MAR) was upgraded to Outperform from Market Perform at JMP Securities.
  
• Grainger (NYSE: GWW) was upgraded to Buy from Neutral at BofA/Merrill.
  
• Duncan Energy Partners (NASDAQ: DEP) was upgraded to Buy from Neutral at UBS.

Alcoa Inc. (NYSE: AA) kicks off the new earnings seasons when it reports third quarter results on Tuesday. The Pittsburgh-based aluminum producer, which celebrated its 120th anniversary with the launch of its website, is expected to post a profit of 54 cents per share, down 15.6% from the same quarter of last year, on revenue of $7.2 billion, down 2.1%. While Alcoa has tended to fall short of estimates in recent quarters, in the second quarter it did offer a positive surprise of almost 3%. Its long-term earnings per share growth forecast is 14.8%, a little less than the S&P 500, and analysts polled by Thomson Financial on average recommend buying Alcoa, and have for more than 90 days. Shares reached a new 52-week low last week, and are down 48.9% from a year ago.

General Electric Co. (NYSE: GE) is also expected to report a slip in earnings this week. Analysts anticipate that the conglomerate will post a third-quarter profit of 45 cents per share, down just 6.3% from a year ago, on revenue of $47.7 billion, which is up 12.1%. GE has tended to eke out small positive surprises in recent quarters, by less than 1% in the second quarter. GE's long-term earnings per share growth forecast is only 11.0%, which is less than the sector average and the S&P 500. The consensus recommendation has recently swung to hold GE, but Warren Buffett has bought in to the tune of $3 billion. GE also reached a new 52-week low last week as the markets tumbled. GE shares are down 48.1% from a year ago.

Analyst upgrades:

• Merriman upgraded shares of Netezza (NYSE: NZ) to Buy from Neutral following the company's solid Q2 results as they believe it is well-positioned for strong operating results heading into 2H09.
  
• JP Morgan raised Cabot (NYS: CBT) to Overweight from Neutral. The firm expects 2009 to be a better year given lower raw material costs and higher contract prices.
  
• JP Morgan also upgraded Royal Ahold (OTC: AHONY) to Overweight from Neutral on valuation.
  
• Liberty International (OTC: LBYIY) was upgraded to Hold from Sell at Deutsche Bank.
  
• BMO Capital upgraded Royal Bank (NYSE: RY) to Market Perform from Underperform and Bank of Montreal (NYSE: BMO) to Outperform from Market Perform.

Analyst downgrades:

• Jefferies downgraded shares of Constellation Energy (NYSE: CEG) to Underperform on Hold on concerns the company will come under increasing pressure to issue equity. The firm lowered its target to $60 from $71.
• Thomas Weisel downgraded Williams-Sonoma (NYSE: WSM) to Market Weight from Overweight citing continued macro pressures.
  
• Wachovia has concerns that Kayne Anderson's (NYSE: KED) book value will be pressured by its investment in ProPetro Services, trading losses associated with SemGroup, and negative developments at Quest Midstream. The firm cut shares of Kayne to Market Perform from Outperform.
• Energy Conversion (NASDAQ: ENER) was downgraded to Neutral from Buy at Piper.
  
• Deutsche Bank cut International Paper (NYSE: IP) and Domtar (NYSE: UFS) to Hold from Buy.
  
• H&E Equipment (NASDAQ: HEES) was lowered at Credit Suisse to Neutral from Outperform.

Analyst initiations:

• Morgan Stanley yesterday initiated Elan Corp (NYSE: ELN) with an Overweight rating. The firm sees a low-probability of a Tysabri withdrawal.
  
• ThinkPanmure views On Semiconductor (NASDAQ: ONNN) as a nice turnaround story with opportunities for shares gains in notebooks and consumer gaming platforms. Shares were initiated with a Buy rating and $14 target.
• Petrohawk Energy (NYSE: HK) was assumed with an Outperform rating at Morgan Keegan.
  
• Regency Energy (NASDAQ: RGNC) was initiated at Merrill Lynch with a Neutral rating.

MOST NOTEWORTHY: SanDisk Corp (SNDK) was the only notable company initiated today:

• Nollenberger believes SanDisk Corp (NASDAQ: SNDK) is going through a "tough patch" due to oversupply in the market and feels Micron Technology (MU) offers a better risk/reward at current levels; the firm started SanDisk with a Neutral rating and $42 target.

OTHER INITIATIONS:

• WR Hambrecht started Universal Electronics (NASDAQ: UEIC) with a Hold on valuation.

• CIBC initiated Iron Mountain Inc (NYSE: IRM) with a Sector Performer.

• SuperValu (NYSE: SVU) was initiated at Credit Suisse with an Outperform rating. The firm expects investors to not fully appreciate SuperValu's robust earnings power and free cash flow following acquisition of Albertson's stores.

• RBC initiated Kayne Anderson Energy Development (NYSE: KED) with a Sector Perform as the firm believes limited publicly-available information on private investments makes valuations problematic.

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