Stocks On The Move: iRobot, Activision…

Following are the days biggest winners and losers. Find out why shares of iRobot (IRBT), Activision (ATVI) and Fossil (FOSL) poppedwhile Carnival Cruises (CCL) and Fortress (FIG) dropped.

POPS (stocks that jumped higher)

Nvidia (NVDA) popped 4%. A Salomon Brothers analyst raised his price target on the maker of video chips to $53 because of last week's strong earnings report. – Pete Najarian thinks this stock is going higher.

iRobot (IRBT) popped 12%. The maker of the Roomba vacuuming machine is a front-runner for an urgent military contract to provide robots capable of sensing roadside bombs, according to Time Magazine. – Karen Finerman likes this stock.

Activision (ATVI) popped 4%. Investors took shelter in the video-game maker after it raised its guidance last week. – Jeff Macke reveals that he’s long this stock.

Fossil (FOSL) popped 5%. The 2 billion dollar watchmaker beat analyst forecasts, thanks largely to strong demand outside the US. – Jeff Macke says sell this stock.

DROPS: (stocks that slid lower)

Carnival Cruises (CCL) dropped 5%. The cruise line operator fell after the National Weather Service upgraded a depression in the Atlantic to Tropical Storm Dean. – Guy Adami jokes that Tim Strazzini must have canceled his vacation plans.

Fortress (FIG) dropped 7%. The hedge fund and private equity firm reported a $55 million second-quarter loss as compensation costs almost doubled. – Don’t own it, says Guy Adami.

RadioShack (RSH) dropped 7%. The Texas-based peddler of electronic wares fell along with other retailers in the wake of Wal-Mart's comments about the consumer. – Jeff Macke says sell this stock.

Delta (DAL) dropped 2%. With hurricane season and fears about the economy growing, who on earth would want to buy the number 3 US airline? – Pete Najarian sees nothing but headwinds for the airlines.

Clean Energy Fuels (CLNE) dropped 23%. The natural-gas company founded by ex-oil wildcatter Boone Pickens said its second-quarter loss more than tripled, even as sales increased. – Karen Finerman says she doesn’t feel sorry for Pickens.

Disney (DIS) dropped 3%. The media giant is rolling over on virtually no news. – Guy Adami jokes that the ESPN 360 launch must not have gone well.

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Trader disclosure: On Aug 14 2007, the following stocks and commodities mentioned or intended to be mentioned on CNBC’s Fast Money were owned by the Fast Money Macke Owns (INTC), (EMC), (ATVI), (DIS); Finerman's Firm And Finerman Own (HD), (KALU) Finerman's Firm Owns (GE), (PHM), (WMT), (KFT); NBC Universal Is The Parent Company Of CNBC