[Reuters] BlackBerry shares drubbed, just days before key results - 03/25/13 09:27 PM
TORONTO (Reuters) - Reports of a lackluster launch of its pivotal new smartphone in the U.S. market cost BlackBerry an influential downgrade on its stock on Monday and a 4 percent drop in its share price, just days ahead of quarterly results that will offer the first concrete gauge of how its new phone is being received.