MOST NOTEWOTHY: ConocoPhillips (COP), InfoSpace, Inc (INSP), Verizon Communications (VZ) and Advanced Micro Devices (AMD) were some of today's more notable downgrades:

• Goldman Sachs downgraded ConocoPhillips (NYSE: COP) to Neutral from Buy.

• Stanford cut InfoSpace Inc (NASDAQ: INSP) to Sell from Hold as the firm believes shares are overvalued since the company has no clear plans to reignite growth.

• Buckingham downgraded Verizon Communications (NYSE: VZ) to Neutral from Accumulate.

• Advanced Micro Devices (NYSE: AMD) was cut to Hold from Strong Buy at Matrix as the firm believes growing competition is driving down selling prices and narrowing margins.

OTHER DOWNGRADES:

• Goldman downgraded Anadarko Petroleum Corp (NYSE: APC) to Sell from Neutral.

• Merriman cut Fiberstars, Inc (NASDAQ: FBST) to Neutral from Buy.

• Bank of America downgraded Dollar General (NYSE: DG) to Neutral from Buy.

• Cantor cut AudioCodes Ltd (NASDAQ: AUDC) to Hold from Buy following the company's lowered Q1 outlook.

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

MOST NOTEWORTHY: Some of today's more notable downgrades include Accredited Home Lenders Holding Co (LEND), RadioShack Corp (RSH) and Shuffle Master, Inc (SHFL):

• Keefe Bruyette cut Accredited Home Lenders Holding Co (NASDAQ: LEND) to Underperform from Market Perform, saying the downturn in the subprime market raised liquidity concerns on the stock.

• RBC downgraded RadioShack Corp (NYSE: RSH) to Underperform from Sector Perform, explaining that cost cutting measures are largely complete and margin expansion estimates are too aggressive.

• Shuffle Master Inc (NASDAQ: SHFL) was downgraded to Hold from Buy at Jefferies, citing the lack of visibility into the company's placements and potential IP protection risk in Macau. Shuffle Master was also cut to Underperform from Peer Perform at Bear Stearns following the company's announcement that it will have to restate prior financial results.

OTHER DOWNGRADES:

• UBS downgraded shares of Marvell Technology Group (NASDAQ: MRVL) to Reduce from Buy, citing risks to HDD demand given upcoming launches by Apple (NASDAQ: AAPL) of NAND-based Video iPods. The analyst expects HDD weakness to phase in and not collapse, but sees limited growth in the HDD segment.

• Roth Capital cut WPT Enterprises, Inc (NASDAQ: WPTE) to Sell from Hold, citing valuation, reduced earnings expectations and execution risk related to bringing the online gaming business in house.

• China Eastern Airlines Corp (NYSE: CEA) was downgraded to Underweight from Equal Weight at Morgan Stanley.

• China GrenTech Corp (NASDAQ: GRRF) was downgraded to Neutral from Positive at Susquehanna.

• RBC cut Nova Chemicals Corp (NYSE: NCX) to Sector Perform from Outperform.

• Sandler downgraded shares of OceanFirst Financial (NASDAQ: OCFC) to Hold from Buy.

• Citigroup downgraded Dollar General Corp (NYSE: DG) to Hold from Buy.

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