Rio closed 4.5% higher to A$87.30, the highest since 2011, while BHP Group rose 2.6%, and Fortescue Metals Group was up 7.8%. Other systems "The estimated impact of the production stoppage is about 40 million tons of iron ore per year, including in this figure the pellet feed needed for the production of 11 million tons of pellets, an impact that will be offset by the increase in production of other systems," Vale said. The global seaborne market totals about 1.6 billion tons, according to the Australian government.