The president has published just 22 letters, many to minor trading partners like Brunei, Moldova and Sri Lanka.

Mining stocks rallied in pre-market trading Thursday after President Trump confirmed the U.S. will impose 50% tariffs on global copper imports beginning August 1, the day he has scheduled his "reciprocal" tariffs to go into effect.

(Reuters) -U.S. President Donald Trump's plans to impose 50% tariffs on copper would include semi-finished products such as those used for power grids, the military and data centers, Bloomberg News reported on Thursday, citing people familiar with the matter.

President Trump will wield 50% copper tariffs on August 1 as he promises more to come with countries such as Brazil in the crosshairs. Delta’s good news, Nvidia scores the first $4 trillion market cap milestone,

Global stocks advanced on Thursday, underpinned by optimism around artificial intelligence and the prospect of upcoming interest rate cuts, while investors kept a cautious eye on U.S. President Donald Trump's tariff actions and their impact on global trade.

Copper futures (HG1:COM) extended their rally on Thursday, rising around 2% as traders reacted to U.S. President Donald Trump’s announcement of a 50% tariff on imported copper, set to take effect on August 1.

Trump said on Tuesday that he would impose a 50% tariff on copper. Though the remarks were light on specifics, his comments sent the metal to all-time highs.

Futures contracts hit a record price after the president announced plans for a 50 percent tariff on the metal, driving up costs for businesses.