IBT Staff Reporter

The Food and Drug Administration said on Thursday that Dendreon's (Nasdaq: DNDN) prostate cancer treatment was safe and effective, sending shares skyrocketing on Friday trading.

Retail security firm Checkpoint Systems, Inc. (NYSE: CKP) announced results for its fiscal fourth quarter on Friday, posting an earnings increase of 93 percent on higher volumes in its core business and foreign exchange.

Discovery Communications, Inc. said that it plans to buy back 25 percent of the stake held by shareholder Cox Communications, Inc. on Thursday.

Shares of Warner Music Group (NYSE: WMG) received a lift Thursday after one Wall Street analyst upgraded the stock.

Philips Electronics (NYSE: PHG), the world's largest lighting maker, confirmed its stated financial targets on Thursday and also said it is reviewing a number of possible acquisitions.

Shares in luxury watch maker Movado Group, Inc. (NYSE: MOV)posted a steep decline on Thursday, after the company's profit exceeded expectations for the fourth quarter but lowered its earnings outlook for 2008.

Shares in logistics firm UTi Worldwide Inc. (Nasdaq: UTIW) tumbled Thursday after the logistics firm reported that it’s earnings four the fiscal fourth quarter were short of expectations.

Shares of biotech firm Targeted Genetics Corp. (Nasdaq: TGEN) shot up Thursday it announced that fourth quarter revenues more than doubled.

Shares of U.S. Steel Corp. (NYSE: X) rose moderately and Lone Star Technologies, Inc. (NYSE: LSS) rocketed Thursday, after an announcement by U.S. Steel that it had agreed to buy Lone Star.

Shares of CV Therapeutics Inc. (Nasdaq: CVTX) fell on Wednesday, after Citigroup downgraded the firm.

Shares of Suncor Energy (NYSE: SU) rose Wednesday after a Deutsche Bank analyst upgraded the firm from Hold to a Buy.

Shares of Sigma Designs fell sharply Wednesday after an analyst cut his rating on the stock.

Software giant Microsoft Corp. (Nasdaq: MSFT) is reportedly in talks to buy online advertising firm, DoubleClick Inc., according to the Wall Street Journal.

Shares of chemical products maker HB Fuller posted steep gains Wednesday, after the company reported strong first quarter earnings and boosted its earnings outlook.

Shares of Beazer Homes USA Inc. (NYSE: BZH) fell more than 9 percent on Wednesday, after the company announced it had the FBI began an investigation related to the firm's mortgage business.

Shares in technology consulting firm Accenture Ltd. rose on Wednesday (NYSE: ACN), one after the company posted strong second quarter the day before, beating estimates and raising its yearly outlook.

Therapeutic device maker AngioDynamics (NASDAQ: ANGO), posted weaker than expected earnings on Wednesday, sending shares of the firm plummeting.

Stocks slid further Wednesday after Federal Reserve Chairman Ben Bernanke appeared to chide investors who may have looked past concerns about inflation following Fed comments last week. The Dow Jones industrials fell more than 100 points.

Federal Reserve Chairman Ben Bernanke told Congress on Wednesday that growing troubles in the market for risky mortgages thus far doesn't appear to be spreading to the overall economy but the situation bears close watching.

Orders to factories for big-ticket manufactured goods rose modestly in February, helped by a rebound in sales of commercial aircraft and autos. Durable goods demand rose by 2.5 percent last month after having plummeted by 9.3 percent in January.

Video game and accessories retailer GameStop Corp. (NYSE: GME) posted earnings on Tuesday, stating same-store sales jumped more than 26 percent in the quarter.

Martha Stewart Living Omnimedia (NYSE: MSO) shares rallied on Tuesday, responding to an upgrade from investment bank, Bear Stearns.

Shares of Nuvelo, Inc. (Nasdaq: NUVO) skyrocketed on Tuesday following news that drug maker's cancer drug was granted 'fast-track' status by the U.S. Food and Drug Administration.

CBRL Group, Inc. shares were down significantly on Tuesday after it reported poor March sales due to bad winter weather at its Cracker Barrel Old Country Store restaurants and gift shops.

Shares of Regeneron Paharmaceuticals, Inc. (Nasdaq: REGN) soared Tusday after initial results of a study involving treatment to prevent a leading cause of age-related acquired blindness showed significant results.

Shares of U.S. home builder Lennar Corp. (LEN) hit a 5 month low on Tuesday after the firm posted a 74 percent profit loss and gave a gloomy outlook this morning.

Shares of Internet telephony company Vonage Holdings Group (NASDAQ: VG) tumbled this morning following a downgrade from Citigroup.

Drug maker Alexza Pharmaceuticals, Inc. (Nasdaq:ALXA) said that two of its drugs for treating schizophrenic patients showed positive initial results in clinical trials, sending its shares skyrocketing.

Shares of Alcatel Lucent, the world's largest telecommunications equipment maker, surged Monday after the company was awarded a 3 year, $6 billion contract from Verizon, Inc. (NYSE: VZ) to expand the company's wireless networks.