The Sao Paulo stock exchange surged Tuesday, following world markets higher on optimism about plans to fight the fallout of the coronavirus pandemic. Brazil's Ibovespa index was up about nine percent in mid-day trade, after falling 5.22 percent Monday. Oil and airline stocks, which have been among the biggest losers in recent days, led the gains. State-run oil company Petrobras was up more than nine percent, while airlines Gol and Azul were up more than 16 percent and 26 percent, respectively. Global markets got a boost from news the US Federal Reserve has launched an unprecedented plan to buy unlimited amounts of Treasury bonds and extend loans to small and medium businesses hit hard by the pandemic. js/jhb/jm