According to SMM, US copper futures hit a record high, widening the premium over London copper futures, as market bets on potential US import tariffs on copper continued to increase. The most active May copper contract on COMEX rose 1.22% to $5.274 per pound, after reaching a record high of $5.374. The three-month copper contract on the London Metal Exchange (LME) fell 1.72% to $9,938 per mt, after earlier hitting $10,164.5, the highest level since June 7. The premium of COMEX copper prices over the global benchmark LME copper prices expanded to a record high. The spread between COMEX May copper and London copper reached over $1,700 per mt, while the premium for December copper exceeded $2,000 per mt.