(Updated - February 4, 2013 7:09 AM EST)

Bernstein upgraded BlackBerry (NASDAQ: BBRY) from ...

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Bernstein Boosts BlackBerry (BBRY) to Outperform; Too Many Positive Scenarios to IgnoreFebruary 4, 2013 10:00 AM Initial Checks Point to Strong Demand for BlackBerry's (RIMM) Z10 in U.K., CanadaFebruary 1, 2013 1:46 PM Reminder: BlackBerry (RIMM) to Start Trading Under 'BBRY' Ticker Next MondayFebruary 1, 2013 7:29 AM Credit Suisse Cuts BlackBerry (RIMM) to Underperform; Buyout/Split Unlikely, Limited Room to GrowJanuary 31, 2013 7:46 AM