UPDATED 16:55 PM EST, January 31, 2013
TORONTO (AP) — Research In Motion's stock gyrations reflect investors' key concern: Is the BlackBerry maker's new phone the company's savior or isn't it?
THE SPARK: The company's critical new phone with the BlackBerry 10 operating system debuted Wednesday to mostly positive reviews. But the phone won't come out in the United States, a key market, until March.
