The 50% tariff that the Trump administration has slapped on Brazilian imports has rattled the global coffee market and could make the price of a cup of coffee in the U.S. jump beyond recent highs. Brazil is the world's largest grower and exporter of coffee,

Volatility in Brazilian assets soared as traders rushed to assess the endgame of President Donald Trump’s threat to impose 50% tariffs on all goods from the South American nation. A measure of one-month swings for the real jumped to the highest since April as the currency went from the worst to the best in emerging markets in the span of an hour.

Brazil believes it can withstand Trump’s 50 percent tariff, and aides to Lula say he is unlikely to shrink from a confrontation with the White House.