RIM stock hits session lows, down 8% as new device launched

Research In Motion sank as much as 8% today as the BlackBerry maker unveiled its long-delayed line of smartphones that it says will mark the company's comeback.

Research In Motion sank as much as 8% on Wednesday as the BlackBerry maker unveiled its long-delayed line of smartphones that it says will mark the company's comeback.

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The stock, which fell as much as 8% after rising more than 6% earlier in the session, was down 4.4%, at C$15.03 in Toronto. On the Nasdaq, shares were down 3.9% at $15.05.