Latest profit warning challenges Thyssenkrupp spin-off logic

FRANKFURT/DUESSELDORF (Reuters) - Thyssenkrupp shares fell to a two-year low on Friday after the German conglomerate cut its profit forecast for the second time this year, raising doubts over a planned deal to split the steel-to-elevators group in two.The profit warning late on Thursday is the second under Guido Kerkhoff, installed as the group's permanent chief executive in July after a tumultuous summer that featured the resignation of the group's chairman and former CEO following mounting..