On Monday, American copper futures jumped by nearly 6%, increasing their premium over London prices amid growing speculation about possible new import tariffs following President Donald Trump's latest aluminum trade measures.

Comex American copper futures rose 5.7% to $4.9175 per pound, the highest since April 3. é The three-month reference copper on the London Metal Exchange (LME) rose by 1.1% à é 9,597.50 dollars per metric ton à 09:44 GMT. According to Tom Price, an analyst at Panmide Liberum, “while copper wasn't even mentioned in Trump's latest announcement, markets are clearly integrating the risk of import tariffs following the February investigation, which highlights strong investor demand for the metal

LME aluminum settled at $2,443.50 per ton, after touching the lowest level since May 12 at $2,425.50. The American Midwestern aluminum premium jumped by 54% compared to Friday, reaching $0.58/lb, or $1,279 per ton. Lead rose 0.9% to $1,975, zinc gained 1.7% to $2,663.50, tin rose slightly by 0.8% to $30,600, and nickel rose 0.9% to $15,365