Boeing says 737 MAX should resume commercial flights in January; shares jump

WASHINGTON (Reuters) - Boeing Co on Monday said it expected U.S. regulators to approve the return to commercial service of its grounded 737 MAX jet in the coming weeks, and its shares jumped as investors grew more hopeful the planemaker had addressed software problems at the heart of two fatal crashes.Boeing said it expected the U.S. Federal Aviation Administration (FAA) to issue an order approving the plane's return to service next month, but added it now expected commercial service to resume..