Copper prices headed for their biggest quarterly rise in ten years on Tuesday, as resurgent Chinese demand, supply disruption and massive global stimulus powered a rebound from four-year lows hit in March. Benchmark copper on the London Metal Exchange (LME) was up 1.4% at $6,043.50 a tonne in official trading — it’s highest since Jan. 23 and up 22% in the last three months. The metal used in power and construction is now just below its January high of $6,343, before the coronavirus spread worldwide. Behind the gains are “supply fears driven by coronavirus spreading in major copper producing countries like Chile and ... (full story)