Antofagasta Shares Fall on Lower Copper Production Forecast
Chile Weather Forces Antofagasta to Slash 2026 Copper Target
COPPER TARGETS CUT AFTER STORMS
Illustration concept: A wide exterior view of a massive open-pit copper mining facility in mountainous South America, dramatic cloudy atmosphere over heavy industrial machinery.
AI summary
Antofagasta led losses on London's FTSE 100 after lowering its 2026 copper output forecast due to weather disruptions in Chile. Severe July storms temporarily halted operations at the Los Pelambres mine, requiring repairs to water systems and pipeline platforms.
Why this matters
Copper is a crucial industrial metal central to global technology manufacturing and the green energy transition. Unexpected production cuts from major suppliers demonstrate how increasingly volatile weather patterns threaten global commodity supply chains and market stability.
Key takeaways
- Antofagasta shares fell 4.9% on the FTSE 100 following a reduced output guidance.
- The 2026 copper target was cut to between 625,000 and 655,000 metric tons.
- Extreme weather in July triggered a state of catastrophe in Chile's Coquimbo Region.
- Primary mining machinery remained unharmed, but pipeline and water systems require repairs.
A sharp decline in mining stocks pulled down London's premier equity benchmark on Thursday morning, driven largely by losses at copper producer Antofagasta. Shares in the UK-listed miner dropped 4.9 percent after executives trimmed long-term output projections for the business.
The downgraded outlook follows extreme weather in South America, where heavy rainfall during July disrupted operations at the company's Los Pelambres facility. Torrential downpours prompted the Chilean government to declare a formal state of catastrophe across the Coquimbo Region.
According to Guardian Business reports, the operational pause forced Antofagasta to recalculate its future targets. The group now expects 2026 copper production to range between 625,000 and 655,000 metric tons, down from a previous estimate of 650,000 to 700,000 tons.
Company officials confirmed that essential machinery and major infrastructure suffered no lasting material damage during the severe weather event. However, engineering crews must complete necessary repairs on pipeline platforms and site water management installations before standard operational levels can be fully reinstated.
The setback among resource stocks weighed heavily on broader trading in London, making the mining segment the largest contributing factor to the FTSE 100's sluggish morning performance relative to European peers.
Frequently asked questions
- Why did Antofagasta lower its copper production targets?
- Severe downpours in July caused an operational shutdown at the Los Pelambres mine in Chile, necessitating repairs to supporting infrastructure.
- What is the new 2026 copper output estimate for Antofagasta?
- The miner projects 2026 output between 625,000 and 655,000 metric tons, reduced from an earlier forecast of 650,000 to 700,000 metric tons.
- Was core equipment destroyed during the Chilean storms?
- No. Antofagasta reported no material damage to primary equipment, though water management networks and pipeline platforms require restoration.
Source & transparency
- By:
- The Reviser Desk
- Source:
- Guardian Business
- Original publication:
- Aug 13, 2026, 1:37 PM
- The Reviser publication:
- Aug 13, 2026, 1:37 PM
- Updated:
- Aug 13, 2026, 1:50 PM
This report was independently written by The Reviser editorial desk from verified source material. It is not original on-the-ground reporting by The Reviser.
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