Benchmark copper on the London Metal Exchange (LME) reached a record high of $10,747.50 a tonne in May but fell 8.6pc last week and touched a low of $9,011 a tonne on Monday.
Benchmark copper on the London Metal Exchange (LME), which hit a 10-year high of $9,617 a tonne last week, was on track for its worst day since October as it lost 4.2% to $8,720.
Nickel, meanwhile, tumbled for a second day. Having reached a seven-year high of $20,110 last week, it traded at $16,175 a tonne, down 7.1% and set for its biggest one-day loss since 2016.