Key Highlights

  • Antofagasta plc (LSE:ANTO) climbed more than 6% on 9 November 2026, making it one of the best performers in the FTSE 100.
  • The FTSE 100 closed up 1.02% at 10,782.87 as Mining shares led a rebound from last week's sell-off.
  • Brent crude fell roughly 4% to around $94 a barrel, easing fuel-cost worries for energy-intensive copper producers.
  • Third-quarter copper output rose 7% to 151,900 tonnes and 2026 guidance of 625,000 to 655,000 tonnes was maintained.
  • Investors are now focused on Los Pelambres recovery, Centinela labour issues, costs and the 2027 growth projects.

Why Antofagasta (LSE:ANTO) Is in Focus Today

Antofagasta plc (LSE:ANTO) was one of the standout stocks on the London market on Monday 9 November 2026. The Chilean copper producer rose by more than 6%, finishing among the strongest performers in the FTSE 100 as the Blue-Chip index recovered from a rough week. The FTSE 100 closed 1.02% higher at 10,782.87, reversing Friday's decline of roughly 1%, with mining shares supplying much of the lift.

Several forces converged at once. Crude Oil dropped around 4% after US President Donald Trump said new attacks on Iran were unlikely while negotiations to end the conflict progress. Industrial metals firmed, and optimism returned over an extension of the US-China trade truce, which matters enormously for a copper miner because China is the largest buyer of the metal. Wall Street also rebounded strongly, with the S&P 500 and Nasdaq gaining around 2% each, easing the technology-led sell-off that had unsettled global markets.

The Oil and Copper Link Behind the Rally

For Antofagasta, falling oil is more than a macro headline. The group lifted its 2026 cash cost forecast before by-product credits to between $2.60 and $2.70 per pound, up from $2.40 to $2.60, citing persistently higher fuel prices. Diesel is a major input at open-pit operations in northern Chile, so a sharp retreat in crude directly improves the Margin outlook. Net cash costs after by-product credits remain guided at $1.15 to $1.35 per pound.

Latest Operating Update in Brief

In mid-October, Antofagasta reported third-quarter copper production of 151,900 tonnes, a 7% increase on the previous quarter. Year-to-date output stood at 436,900 tonnes, down 8.3% compared with the same period of 2025, mainly because of lower ore grades at Centinela Concentrates and weaker recoveries at Centinela Cathodes.

Los Pelambres produced 79,300 tonnes in the quarter, up 17.5% sequentially, as the operation recovered from a shutdown in July. Extreme rainfall had led the Chilean government to declare a state of catastrophe in the Coquimbo region. Management expects higher grades and throughput at Los Pelambres in the fourth quarter. By-product molybdenum remained under pressure, with nine-month output down 21.1% to 9,000 tonnes on lower grades.

Guidance, Capital Spending and the 2027 Outlook

Antofagasta maintained 2026 copper production guidance of 625,000 to 655,000 tonnes, a range that was lowered earlier in the year from 650,000 to 700,000 tonnes after a weak first quarter. The company also introduced 2027 guidance of 630,000 to 690,000 tonnes, reflecting higher expected grades at Los Pelambres partly offset by lower grades at Centinela Concentrates. Some Market Participants viewed the 2027 range as cautious, and the shares reportedly came under pressure when it was released.

Capital expenditure is guided at around $3.4 billion for 2026, reflecting the build-out of two major growth projects. Chief Executive Iván Arriagada has said the Centinela and Los Pelambres expansion projects are on track for commissioning in 2027. Delivery on schedule is central to the long-term Investment case, because these projects are designed to lift volumes and lower unit costs once they ramp up.

Labour and Operational Risks Still in the Picture

Not every headline is supportive. Two unions at Centinela went on strike after the end of the third quarter, a development that investors continue to monitor because Centinela is a core contributor to both copper and gold output. Chile has a history of labour actions during wage negotiations, and a prolonged stoppage could affect fourth-quarter volumes and the company's ability to reach the middle of its guidance range.

What Investors Are Watching Next

The first item on the watchlist is the copper price and the direction of Chinese demand. Any further progress on US-China trade talks, along with stimulus signals from Beijing, would support the metal and, by extension, Antofagasta's earnings. The second is oil: if Brent stays lower, cost guidance could prove conservative.

Third, traders will look for updates on the Centinela strike and on Los Pelambres performance ahead of the fourth-quarter production report, which will also give a firmer view of full-year delivery against the 625,000 to 655,000 tonne range. Fourth, the broader risk backdrop matters. Last week's global sell-off showed how quickly sentiment can turn, and renewed Volatility in technology shares or geopolitical headlines could pull cyclical stocks lower again. Finally, Merger and Acquisition activity across the copper sector, including the planned combination of Anglo American and Teck Resources, keeps attention on the Scarcity value of high-quality copper assets.