Copper, Zinc, Tin Slide in Shanghai Night Session; Alumina Edges Up

Tin's outsized decline and copper's broad-based weakness point to a night session driven by macro risk aversion rather than any single metal's fundamentals, since base metals moved largely in lockstep. Alumina's modest gain against that backdrop is the notable divergence, suggesting its supply story is currently decoupled from the industrial-metals complex. Whether that split persists once the night session's thin liquidity gives way to daytime trading is the open question.