The past six months have been fairly scary for Wall Street and Corporate America.

But this is actually good news for LECG (NASDAQ: XPRT). The company operates a network of independent experts who help with complex things like antitrust, litigation, accounting, healthcare, and so on.

It can be a volatile business. According to LECG's Q4 report, there was a net loss of $2.7 million, or $0.11 per share. But revenues inched up 1% to $88.2 million.

MOST NOTEWORTHY: Teva Pharma, Novavax, Corinthian Colleges, Fair Isaac and Tenneco were today's noteworthy upgrades:

• Friedman Billings upgraded Teva Pharmaceutical (NASDAQ: TEVA) to Outperform from Market Perform following Teva's better-than-expected Q3 report and guidance.
  
• Oppenheimer upgraded shares of Novavax (NASDAQ: NVAX) to Buy from Neutral based on positive expectations for Ph I/IIa pandemic influenza data, the start of clinical trials for seasonal influenza, and expected announcement of a vaccine product candidate in Q4.
  
• Corinthian Colleges (NASDAQ: COCO) was upgraded to Buy from Neutral at Merrill following its better-than-expected Q1 report and guidance.
  
• Citigroup upgraded of Fair Isaac (NYSE: FIC) to Buy from Hold shares to reflect the company's strong Q4 results and improved outlook.
  
• Tenneco (NYSE: TEN) was raised to Outperform from Market Perform at Wachovia based on valuation and revenue opportunities in commercial truck market.

OTHER UPGRADES:

• Energizer Holdings (NYSE: ENR) was upgraded at Bear Stearns to Peer Perform from Underperform.
  
• Key Banc upgraded Post Properties (NYSE: PPS) to Hold from Underweight.
  
• Morgan Stanley upgraded MetroPCS (NYSE: PCS) to Overweight from Equal Weight.
  
• William Blair upgraded LECG Corporation (NASDAQ: XPRT) to Market Perform from Underperform.