Base metals close lower in overnight session; copper down 1.07%, nickel falls 1.71%

The breadth of the overnight decline matters more than any single move: copper, zinc, nickel and tin all fell together, pointing to a broad risk-off tone across industrial metals rather than a story specific to one chain. Tin's steeper drop and nickel's weakness suggest the more cyclical, electronics- and stainless-linked names bore the brunt, while alumina's lone gain hints at input-side tightness diverging from the finished-metal complex. Whether that divergence persists — and whether alumina strength spreads to the rest of the complex — is the open question worth watching.