USD Index at 101.69 down 0.04% and S&P 500 up 0.58% provided a neutral macro backdrop that failed to offset copper price strength at 6.5765 USD/lb up 0.59%, as supply-side risks dominated pricing signals. Teck Resources received a strike notice from United Steelworkers Local 7619 covering 1,200 workers at its Highland Valley Copper mine, with action possible from 8 a.m. PT October 24 after the September 30 contract expiry; the operation is Canada’s largest copper mine and adds to existing force-majeure and strike disruptions at Freeport-McMoRan’s Grasberg, Zijin’s Bisha and Antofagasta’s Centinela. Teck Resources faces immediate output risk at Highland Valley while Freeport-McMoRan and Antofagasta continue to manage their respective supply shortfalls layered on top of the new Canadian threat.