TORONTO (Reuters) - A wave of optimism surrounding the launch of Research In Motion's re-engineered BlackBerry line picked up momentum on Thursday with Goldman Sachs raising its rating on the smartphone maker and setting off a surge in its share price. The brokerage firm joined a growing chorus of analysts who have warmed to the prospects of a successful introduction of the new BlackBerry 10 devices, which RIM hopes will let it claw back market share lost to Apple Inc's iPhone and smartphones powered by Google's Android platform. ...

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Facebook's stock is up more than 7 percent despite expectations that it would fall because more than 850 million additional shares in the company are being freed up for sale.

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SAN FRANCISCO (Reuters) - Shares of Facebook Inc jumped nearly 13 percent on Wednesday, as investors breathed a sigh of relief that expiring trading restrictions on a huge block of shares failed to trigger an immediate wave of insider selling. "While the lockup is expiring, there is nothing requiring anybody to sell," said Tim Ghriskey, chief investment officer at Solaris Group in Bedford Hills, New York. "Given the low price, these long-term holders are deciding to hold the stock, and that is lifting it here as the fear of the expiration subsides. ...

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Rupert Murdoch's News Corp. is preparing to spin off its newspaper business into a separate company, an acknowledgement that the printed page that gave rise to a media empire will never again be central to its future.

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