Tokyo's key Nikkei stock index suffered its largest point drop in over two months on Monday after Federal Reserve Chairman Jerome Powell's hawkish remarks about fighting inflation late last week raised worries about the U.S. economy.Investor sentiment was hurt as the Dow Jones index logged its largest point drop since mid-May on Friday after Powell's speech at a forum in Jackson Hole, Wyoming, prompting the Nikkei to lose over 850 points at one point and finish down 762.42 points, or 2.66 percent, from Friday to close at 27,878.96, the lowest finish since Aug. 10.Related coverage:READ FULL ARTICLE