Analyst upgrades:

• Jefferies upgraded Aruba Networks (NASDAQ: ARUN) to Buy from Hold following the company's Q3 results to reflect improved visibility. The firm raised its target price to $6.50 from $3.
• Citigroup upgraded Mosaic (NYSE: MOS) and Potash (NYSE: POT) to Buy from Hold and Agrium (NYSE: AGU) to Hold from Sell as it believes stronger grain fundamentals more than offset China contract risk. The firm raised its target on Mosaic to $72 from $48, on Potash to $145 from $83 and on Agrium to $55 from $36.
• Fulton Financial (NASDAQ: FULT) Was upgraded to Market Perform from Underperform at Keefe Bruyette.
• Rio Tinto (NYSE: RTP) was raised to Neutral from Sell at Goldman.
• Noble Corp. (NYSE: NE) was upgraded at Deutsche Bank to Buy from Hold.

"Loews (NYSE: L), the holding company of the New York-based Tisch family, is a way of buying a collection of good stocks at a discount, with much else thrown in free," says Adrian Day.

The editor of the top-notch The Global Analyst explains, "These value investors have a long record of buying quality assets cheaply when they are out of favor, nurturing them, and eventually monetizing them."

"Everyone loves a sale, right? Typically, the Tisch family buys major chunks of out-of-favor businesses, often publicly traded, and holds them for many years. They exemplify the important traits of successful value investors: discipline and patience.

"I calculate a New Asset Value for Loews-taking current (depressed) stock prices for its publicly traded holdings, the cash, and conservative valuations for the private assets-of almost $39 per share.

MOST NOTEWORTHY:

• Credit Suisse downgraded Nasdaq Stock Market Inc (NASDAQ: NDAQ) to Market Perform from Outperform on valuation.
  
• JP Morgan expects Family Dollar Stores Inc (NYSE: FDO) to face macro pressures and increased competition from Wal-Mart Stores Inc (NYSE: WMT) and Dollar General.
  
• Bear downgraded shares of Circuit City Stores Inc (NYSE: CC) to Peer Perform from Outperform based on lack of visibility, execution issues, softer consumer environment, potential pricing disruptions, and product cycle concerns.
  
• Merrill downgraded shares of Wells Fargo and Company (NYSE: WFC) to Neutral from Buy to reflect higher credit losses and valuation and KeyCorp (NYSE: KEY) to Sell from Neutral to reflect the company's "weak" revenue growth.

• B. Riley downgraded shares of Iris International Inc (NASDAQ: IRIS) to Neutral from Buy.
  
• Soleil downgraded ExpressJet Holdings Inc (NYSE: XJT) to sell from Hold.
  
• Calyon downgraded Weatherford International (NYSE: WFT), Transocean Inc (NYSE: RIG) and Diamond Offshore Drilling Inc (NYSE: DO) to Add from Buy.

• JP Morgan upgraded shares of Progress Energy Inc (NYSE: PGN) to Neutral from Underweight citing the company's improving earnings profile.

• Lehman upgraded shares of Mattel Inc (NYSE: MAT) to Equal Weight from Underweight with a $26 target, citing increased traction at retail stores for Barbie as well as expectations for 10% earnings growth.

• Career Education Corp (NASDAQ: CECO) was upgraded to Neutral from Underperform at Credit Suisse as they believe general start growth will bottom in 4Q/1Q and that its University division will return to positive start growth in 3Q07.

• Pacific Growth upgraded shares of Marvell Technology Group ltd (NASDAQ: MRVL) to Buy from Neutral to reflect the aggressive transfer of the Intel (NASDAQ: INTC) cell phone foundry business.

• Both Soleil Securities and Bank of America upgraded Warner Music Group Corp (NYSE: WMG) to Buy from Hold with a $23 target in order to reflect the company's improved fundamentals; they believe Warner's balance sheet restructuring bodes well for earnings.

• Merrill Lynch upgraded JetBlue Airways Corp (NASDAQ: JBLU) to Buy from Neutral on valuation.

• Diamond Offshore Drilling Inc (NYSE: DO) was added to Goldman Sachs' Conviction Buy List.

• CIBC upgraded Wells Fargo & Co (NYSE: WFC) to Sector Outperformer from Sector Performer, citing valuation and the $8 billion in excess capital in the coffers.

• Wachovia upgraded Fossil, Inc (NASDAQ: FOSL) to Outperform from Market Perform.

• HSBC upgraded Sony Corp (NYSE: SNE) to Neutral from Underweight.

MOST NOTEWORTHY: Western Union (WU) and Office Max (OMX) top today's modest list of initiations.

• Western Union was initiated with a Buy at Soleil Securities. The firm believes Western Union is well positioned to take advantage of the projected growth in the world's immigrant population.
• Office Max was initiated by Piper Jaffray with an Outperform rating and $50 target. The firm still believes there is upside to Office Max's turnaround story led by their management team.

OTHER INITIATIONS:

• Diamond Offshore (DO) was initiated with a Buy rating and $107 target at Calyon Securities citing valuation and industry fundamentals for the rating.
• UBS assumed coverage of Alltel (AT) with a Neutral citing a weak wholesale/roaming revenue outlook. Alltel was also initiated by Pacific Crest with a Market Perform Alltel, citing modest growth prospects.
• And finally, Electronics for Imaging (EFII) was initiated with a Neutral at the Banc of America. The firm believes Q4 estimates will need to come down based on the impact of further delays at Canon (CAJ) on the 70 page per minute printer, pushing a lunch to March 2007.

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