By Anmol Choubey

(Reuters) -Goldman Sachs lowered on Thursday its global copper mine supply forecast for 2025 and 2026 following a disruption at Indonesia’s Grasberg, the world’s second-largest copper mine.

The incident, which occurred on September 8, trapped workers underground due to heavy mud flow, prompting operator Freeport-McMoRan to declare force majeure.

The bank estimates there will be a total loss of 525,000 metric tons of copper mine supply as a result of the disruption, reducing its global mine supply forecast for the second half of 2025 by 160,000 tons and its 2026 forecast by 200,000 tons.

Grasberg’s production is now expected to fall by 250,000 to 260,000 tons in 2025 and by 270,000 tons in 2026.

Goldman said Freeport noted that fourth quarter 2025 production from Grasb

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