MOST NOTEWORTHY:

• Piper downgraded shares of U.S. Auto Parts (NASDAQ: PRTS) to Neutral from Buy following the company's Q4 results.
  
• JMP Securities cut DealerTrack (NASDAQ: TRAK) to Market Perform from Strong Buy as they believe future market share losses to RouteOne are more significant than previously believed.
  
• Oppenheimer has concerns that most of AspenBio Pharma's (NASDAQ: APPY) market value is tied to the AppyScore test for appendicitis, while available clinical data may not be sufficient to drive adoption. The firm lowered APPY to Perform from Outperform.

• Wachovia cut Reddy Ice (NYSE: FRZ) to Market Perform from Outperform.
  
• Deutsche Bank lowered its rating on Valspar (NYSE: VAL) and Airgas (NYSE: ARG) to Hold from Buy.
  
• Goldman downgraded Orbitz Worldwide (NYSE: OWW) to Neutral from Buy.

Analyst downgrades: PRTS, TRAK and APPY originally appeared on BloggingStocks on Fri, 07 Mar 2008 11:45:00 EST. Please see our terms for use of feeds.