(Updated - March 21, 2013 10:21 AM EDT)

Byron Capital Markets downgraded BlackBerry (NASDAQ: BBRY) from Buy to Hold ...

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Downgrades Hot Downgrades

Blackberry (BBRY) Checks Show Euphoria Fading Fast, Analyst Warns of Margin PressureMarch 22, 2013 9:06 AM UPDATE: Cormark Upgrades BlackBerry (BBRY) to Buy, Sentiment TurningMarch 21, 2013 3:13 PM Jabil Circuit (JBL) Still Solid; No Problem With Apple (AAPL) Biz - Needham & CompanyMarch 21, 2013 12:40 PM Blackberry (BBRY) Gross Margin Could Surprise to Upside, Says AnalystMarch 21, 2013 8:24 AM UPDATE: BlackBerry (BBRY) Gets Another Bull; Morgan Stanley Raises Two-Notches to OverweightMarch 20, 2013 7:14 AM