TORONTO - BlackBerry Ltd (BB.TO) shares fell $0.54 or 4.52 per cent to close at $11.41 on Tuesday after brokerage Goldman Sachs issued a "sell" recommendation on the stock, citing concerns about rising competition in its core mobile messaging business.
Canadian markets were closed on Monday for a national holiday.
BlackBerry's Nasdaq-listed shares fell 7 U.S. cents or 0.77 per cent to close at US$9.03
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