The Globe and Mail reports in its Thursday edition that BlackBerry's stock soared Wednesday after the company posted stronger-than-expected revenues and operating profits in its fiscal first quarter and first net profit in more than three years. The Globe's Sean Silcoff writes, however, analysts -- and management -- cautioned the company faces uncertainty from its car software business in the second quarter owing to the impact of U.S. President Donald Trump's tariffs on auto sales, and that overall revenue growth remains muted despite BlackBerry's recent resurgence under chief executive officer John Giamatteo. "A material upward re-rating in the shares requires improved growth, which seems less likely at the moment," RBC analyst Paul Treiber said in a note Wednesday. He kept his "sector perform" rating on the stock unchanged but increased his price target on the stock to $4 from $3.75 (all figures U.S.). BlackBerry stock closed up 12.5 per cent in heavy trading on Wednesday, exchanging hands for just under $5 a share on the New York Stock Exchange. The company generated revenue of $121.7-million in its fiscal first quarter ending May 31, down 1.4 per cent year over year but nearly $10-million above consensus estimates.