Coffee futures climbed sharply after US President Donald Trump imposed 50% tariffs on Brazilian imports, raising concerns about global supply and the prospect of higher prices for American consumers. Trump accused the Brazilian government of suppressing free speech and launching a "witch-hunt" against former right-wing president Jair Bolsonaro. He said the US would apply the steep tariff starting 1 Aug. Arabica coffee prices on the NYSE rose more than 3.5% on Thursday morning in reaction to the announcement. Brazil is the world's largest producer of arabica coffee, which is commonly used in premium blends.