Factbox: IBM's 'surprise' CEO: Arvind Krishna to take over from Ginni Rometty

(Reuters) - International Business Machines Corp's Ginni Rometty, the first woman chief executive of the tech pioneer, will be replaced in April by the head of its fast-growing cloud business, Arvind Krishna.While the leadership change was largely expected, Wall Street analysts were surprised by the timing and the choice of Krishna as the CEO."We believe the frontrunners in most investors' minds had been either Jim Whitehurst (former CEO of Red Hat) or former CFO Martin Schroeter," said..