BlackBerry falls after introducing newest phone

Shares of Research in Motion gave up early gains Wednesday after its CEO introduced the new BlackBerry 10 on a stage in New York.Company shares have risen 40 percent since the beginning of the year and it wouldn't be the first time that the introduction of a much-anticipated product did not boost share value for a tech company.Companies like Apple have seen their shares whipsaw on the day that new products are unveiled.There are actually two models of the new phone - the Z10 and the Q10. The Q10 has a physical keyboard, a feature that has kept BlackBerry users loyal over the years. The Z10 will have only a touch-screen keyboard. Click here for full story