A significant chunk of Chinese copper demand has all but evaporated after the metal’s stunning surge to record levels. Copper on the London Metal Exchange burst through $13,000 a ton for the first time this week, extending its rally to nearly 50% over the past year. A cocktail of bullish factors could drive prices even higher over the short term. While real-world buyers typically take time to adjust to such sharp increases, what’s notable in this case is the extent to which industrial users in the biggest ...