Sao Paulo's stock exchange rebounded more than six percent early Tuesday after plummeting 12 percent on Monday as global markets panicked over the new coronavirus and a plunge in oil prices. The Ibovespa index quickly climbed 6.5 percent before falling back a touch to a 5.2 percent rise just before 10:30 am (1330 GMT). Monday's losses in Latin America's biggest exchange were the worst since 1998. js/yow/bc/ft