• Friedman Billings upgraded LSI Corp (NYSE: LSI) to Outperform from Market Perform as it believes the risk/reward is attractive at current levels as the company's near-term business trends are stabilizing. The firm maintains a $4 target on the stock.
  
• Merriman upgraded shares of Medarex (NASDAQ: MEDX) to Neutral from Sell on valuation following the stock's 40% decline year-to-date.
  
• Morgan Stanley upgraded ITT Educational (NYSE: ESI) to Overweight from Equal Weight. The firm believes valuation appropriately discounts risks from its internal lending program.
• Noble (NYSE: NE) was upgraded to Buy from Neutral at Goldman and added to the Conviction Buy List.
  
• Energizer (NYSE: ENR) was raised to Neutral from Sell at UBS.
  
• Arch Chemicals (NYSE: ARJ) was upgraded at KeyBanc to Hold from Underweight.

• Jefferies upgraded shares of Red Hat (NYSE:RHT) to Buy from Hold after their checks indicated Red Hat's November quarter results will be in-line due to solid Jboss sales. The firm also believes a potential new partnership with Cisco (NASDAQ:CSCO) could provide share upside.
  
• Barclays upgraded Amazon.com (NASDAQ:AMZN) to Overweight from Equal Weight as they believe the company's competitive position will strengthen during the current downturn and that the company will gain share.
• JP Morgan upgraded YRC Worldwide (NASDAQ:YRCW) to Neutral from Underweight following the announcement that the company and the Teamsters will vote on contract modifications.
• Del Monte Foods (NYSE:DLM) was raised to Overweight from Equal Weight at Stephens.
  
• Thomson Reuters (NYSE:TRI) was upgraded at Morgan Stanley to Equal Weight from Underweight.
  
• Reliant Energy (NYSE:RRI) was lifted to Outperform from Market Perform at Wachovia.

• B. Riley downgraded shares of Hot Topic (NASDAQ:HOTT) to Neutral from Buy to reflect a lack of visibility into 2009 and valuation but raised their target price to $9.30 from $8.20.
• Citigroup cut KLA-Tencor (NASDAQ:KLAC) to Hold from Buy to reflect their more offensive stance on the semi group as they view KLA-Tencor as a more defensive name. The firm lowered their target to $22 from $31.
• KeyBanc downgraded Arch Chemicals (NYSE:ARJ) to Underweight from Hold citing global economic headwinds, the stronger dollar, pension costs, and continued weakness in North American housing, among other reasons.
  
• Jo Ann Stores (NYSE:JAS) was cut to Hold from Buy at Soleil.
• Calyon downgraded Schlumberger (NYSE:SLB) to Outperform from Buy.
• Amdocs (NYSE:DOX) was downgraded to Neutral from Buy at Goldman.

MOST NOTEWORTHY: The Aerospace sector, Boeing, Aurora Oil & Gas and Syniverse were today's noteworthy downgrades:

• Goldman downgraded the Aerospace sector to Cautious from Neutral to reflect high oil prices and the weak economy. The firm also downgraded Boeing (NYSE: BA) shares to Sell from Neutral and added the stock to their Conviction Sell List as they expect the economic weakness and high fuel prices to drive slowing orders.
  
• Jefferies downgraded shares of Aurora Oil & Gas (AMEX: AOG) to Underperform from Hold to reflect the company's falling production, minimal cash flow through the remainder of 2008, and limited access to capital.
  
• Baird cut Syniverse (NYSE: SVR) to Neutral from Outperform as they believe the impact from the Verizon (NYSE: VZ)-Alltel merger could be greater than investors think.

OTHER DOWNGRADES:

• Arch Chemicals (NYSE: ARJ) was lowered at Oppenheimer to Perform from Outperform.
  
• New York Community Bancorp (NYSE: NYB) was downgraded to Hold from Buy at Citigroup.
  
• Sonic (NASDAQ: SONC) was downgraded to Equal Weight from Overweight at Stephens.