Oil falls more than 4 percent following stock market down

NEW YORK (Reuters) - Oil prices tumbled more than 4 percent on Monday to the lowest in over a year as global stock markets fell on concerns about a U.S. government shutdown and worsening world economy.U.S. crude hit the lowest since June 26, 2017 and global benchmark Brent fell to the weakest since Aug. 31, 2017 ahead of an early market settlement due to the Christmas holiday.Crude futures have fallen more than 30 percent so far this quarter, to the lowest since the third quarter of 2017, as..