MOST NOTEWORTHY: Concur Tech, Groupe Danone and General Motors were today's noteworthy downgrades:

• Piper downgraded shares of Concur Tech (NASDAQ: CNQR) to Neutral from Buy after transferring analyst coverage, as they believe potential upside to estimates is priced into shares while competitive concerns from American Express (NYSE: AXP) are not.
  
• Morgan Stanley downgraded shares of Groupe Danone (OTC: GDNNY) to Equal Weight from Overweight to reflect reduced visibility in the company's core business.
  
• Merrill downgraded General Motors (NYSE: GM) to Underperform from Buy citing the company's deteriorating US auto sales, resulting in a higher cash burn, which could result in a larger than expected capital raise. The firm believes GM capital raise could be in the range of $15 billion and notes that bankruptcy is "not impossible."

OTHER DOWNGRADES:

• Progenics Pharma (NASDAQ: PGNX) was lowered to Underperform from Market Perform at Friedman Billings.
  
• UAL Corp. (NASDAQ: UAUA) was cut to Neutral from Buy at Goldman.
  
• Lehman downgraded Apria Healthcare (NYSE: AHG) to Underweight from Equal Weight at Lincare Holdings (NASDAQ: LNCR) to Equal Weight from Overweight.

MOST NOTEWORTHY: Thornburg Mortgage, Keryx Biopharma and Aeropostale were today's noteworthy downgrades:

• Jefferies downgraded shares of Thornburg Mortgage (NYSE: TMA) to Underperform from Hold after the company said it is unable to meet margin calls despite asset sales and will restate 2007 earnings.
  
• Keryx Biopharma (NASDAQ: KERX) was downgraded to Neutral from Buy at Merrill, to Neutral from Overweight at JP Morgan, to Underperform from Market Perform at Rodman & Renshaw, to Hold from Buy at Jefferies and to Underperform from Outperform at Bear Stearns after the company announced the Sulonex SUN-MICRO Phase 3 trial failed to meet the primary endpoint.
  
• Citigroup lowered Aeropostale (NYSE: ARO) to Sell from Hold as they believe inventory levels are building and that there is downside risk to Q1 estimates.

OTHER DOWNGRADES:

• Deutsche Bank cut Lincare Holdings (NASDAQ: LNCR) to Sell from Hold.
  
• RBC Capital lowered J2 Global (NASDAQ: JCOM) to Sector Perform from Outperform.
  
• Goldman removed Wal-Mart (NYSE: WMT) from its Conviction Buy List.

MOST NOTEWORTHY: Lincare Holdings, Gentiva Health, Five Star Quality Care, Arris and U.S. Steel Group were today's noteworthy upgrades:

• Jefferies upgraded shares of Lincare Holdings (NASDAQ: LNCR) to Buy from Hold on valuation as they now believe the likelihood that Congress could severely cut Medicare oxygen reimbursement this year is priced into shares.
  
• Jefferies also upgraded Gentiva Health (NASDAQ: GTIV) to Buy from Hold on valuation, as they believe the recent sell-off is overdone.
  
• RBC Capital raised Five Star Quality Care (AMEX: FVE) to Outperform from Sector Perform, as they believe the company's Q3 report could be better than expected and that census and outlook are improving.
  
• CIBC upgraded shares of Arris Group (NASDAQ: ARRS) to Sector Outperformer from Sector Performer on valuation as they believe the weakness in the stock is overdone.
  
• Deutsche Bank upgraded shares of U.S. Steel (NYSE: X) to Buy from Hold, as they expect the company to be a major beneficiary of rising raw material costs. Further, Deutsche thinks Lone Star and Stelco will be catalysts for earnings growth in 2008.

OTHER UPGRADES:

• VeraSun Energy Corporation (NYSE: VSE) was upgraded to Overweight from Equal Weight at Morgan Stanley.
  
• UST Inc (NYSE: UST) was upgraded to Buy from Neutral at Goldman.
  
• JP Morgan upgraded BASF AG (OTC: BASFY) to Overweight from Neutral.
  
• Avondale Partners upgraded Polaris Industries (NYSE: PII) to Market Outperform from Market Perform.