MOST NOTEWORTHY: Momenta Pharmaceuticals, Interpublic Group, Lionbridge, PetroChina and Collagenex were today's noteworthy downgrades:

• Deutsche Bank downgraded shares of Momenta Pharmaceuticals Inc (NASDAQ: MNTA) to Hold from Buy and lowered their target to $6 following the FDA's non-approvable letter for M-Enox.
• Banc of America downgraded shares of The Interpublic Group of Companies Inc (NYSE: IPG) to Neutral from Buy to reflect the economic uncertainty and concerns regarding the company's relative revenue growth.
• Lionbridge Technologies Inc (NASDAQ: LIOX) was downgraded to Sell from Neutral at Goldman Sachs following disappointing Q3 results and guidance.
• Credit Suisse downgraded PetroChina Company Limited (NYSE: PTR) to Underperform from Neutral based on lack of catalysts.
• Jefferies lowered its rating on Collagenex Pharmaceuticals Inc (NASDAQ: CGPI) to Hold from Buy to reflect a lack of near-term catalysts given the company's thin pipeline.

OTHER DOWNGRADES:

• JP Morgan removed Cognizant Technology Solutions Corporation (NASDAQ: CTSH) from its Focus List and downgraded Performance Food Group Company (NASDAQ: PFGC) to Underweight from Overweight.
• Friedman Billings downgraded Charlotte Russe Holding Inc (NASDAQ: CHIC) to Market Perform from Outperform.
• Jefferies downgraded Forest Oil Corporation (NYSE: FST) to Hold from Buy.

MOST NOTEWORTHY: IBM Corp (IBM), Amazon.com, Inc (AMZN), Hewlett-Packard Co (HPQ), Universal Technical Institute (UTI) and 3Com Corp (COMS) were some of today's noteworthy upgrades:

• Goldman upgraded IBM Corp (NYSE: IBM) to Buy from Neutral to reflect the company's valuation creation moves, as the firm believes IBM's accelerated buyback program and pension expense reduction will be accretive to earnings.

• Despite ThinkEquity's belief that the company was faltering, Amazon.com (NASDAQ: AMZN) customers have grown in size and accelerated their purchases. The upgrade to Accumulate from Source of Funds was based on Amazon.com's increase of market share in core categories.

• AG Edwards upgraded Hewlett Packard (NYSE: HPQ) to Buy from Hold based on higher estimates, continued share gains and the evidence that HPQ has continued its cost cutting abilities.

• BMO Capital upgraded shares of Universal Technical Institute (NYSE: UTI) to Market Perform from Underperform following the company's Q1 results.

• 3Com (NASDAQ: COMS) was upgraded to Hold from Sell at Matrix USA based on the company's improving balance sheet ..

OTHER UPGRADES:

• Jefferies upgraded Lionbridge Technologies (NASDAQ: LIOX) to Buy from Hold.

• Bear Stearns raised Time Warner Telecom Inc (NASDAQ: TWTC) to Outperform from Peer Perform.

• Morgan Keegan upgraded Jones Apparel Group, Inc (NYSE: JNY) to Market Perform from Underperform and Bebe Stores, Inc (NASDAQ: BEBE) to Outperform from Market Perform.

• Prudential upgraded Alcan Inc (NYSE: AL) to Neutral from Underweight.

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

MOST NOTEWORTHY: Verisign (VRSN) and Entergy (ETR) led a light upgrade list Monday morning as the Dow and Nasdaq moved higher in early trading.

• Lehman upgraded VeriSign, Inc. (NASDAQ:VRSN) to Overweight from Equal Weight, saying it expects the company's upcoming restructuring and pending sale of the Jamba ringtone business to result in improving prospects for 2007 and investor sentiment.
• BMO Capital upgraded Entergy Corp. (NYSE:ETR) to Outperform from Market Perform, target to $110, indicating that its earnings will accelerate over the next four years.
• Wachovia upgraded Express Scripts, Inc. (NASDAQ:ESRX) to Outperform from Market Perform, citing the recent sell-off, which the firm believes is overdone; it has a $74-$82 valuation range for ESRX.

OTHER UPGRADES:

• Merrill Lynch upgraded Unilver (NYSE:UN) to Neutral from Sell, saying the recent quarter represented the first signs of recovery.
• Finally, First Albany upgraded Lionbridge Technologies, Inc. (NASDAQ:LIOX) to Strong Buy from Buy, target to $10, citing Q3 results and price weakness.

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