Freeport-McMoRan (NYSE: FCX) has declared force majeure for supply contracts from the Grasberg mine in Indonesia, triggering a noticeable movement in the copper market. On the CME, three-month futures rose above $10,496 per tonne ($4.7710 per pound) on Wednesday, while in London, copper for delivery in three months on the LME temporarily rose to $10,172 per tonne – the highest level in more than 15 months. Freeport-McMoRan’s stock lost as much as 10.4% in New York. The market is thus assessing short-term supply risks due to the disruption at the world’s third-largest copper mine, which is further straining the already tight copper market.
Accident at the Grasberg Complex: Status of Production and Significance for Freeport-McMoRan
The trigger for this development is a serious accident on September 8, 2025, at the Grasberg Block Cave mine, part of the large-scale underground complex in the Indonesian province of Papua. According to company reports, approximately 800,000 tons of wet material suddenly flowed into the mine structure and moved rapidly across several levels – including the service level where a team was carrying out development work. Two employees were killed, and five others are still missing. Freeport-McMoRan has since suspended production at Grasberg.
The affected ore panel “PB1C” is one of five production blocks of the block cave. However, the dynamics of the event also damaged infrastructure required for other mining areas in the district. The significance of the deposit is considerable: According to the information, the Grasberg Block Cave accounts for approximately 50% of PT Freeport Indonesia’s proven and probable reserves as of December 31, 2024, as well as approximately 70% of the company’s previously projected copper and gold production until 2029. Against this background, it is clear why the stoppage not only affects Freeport-McMoRan’s planning, but also the global supply situation for copper – a key metal for electrification, energy transition and infrastructure.
Will Copper Production at Grasberg Only Return to Pre-Accident Levels in 2027?
Analysts at BMO Capital Markets classify the step as in line with expectations for a weaker second half of 2025, but highlight that the preliminary reduction in production planning for 2026 by 35% is an additional negative factor. Accordingly, the market expects that production in Grasberg could only reach the level before the event again in 2027. At the same time, the analysts point out that around 60% of Freeport-McMoRan’s copper production comes from North and South America. This regional foothold mitigates the immediate effects from Indonesia – especially since higher copper prices as a result of lower availability could offset some of the losses without fully compensating for them.
Operationally, Freeport-McMoRan has adjusted its forecast for the third quarter: Compared to the July assumptions, management now expects consolidated sales of copper to be approximately 4% lower and gold sales to be approximately 6% lower. These corrections reflect the temporary production stoppage as well as necessary safety and repair work in the mine structure. In addition, the company emphasizes the ongoing search and rescue operations as well as the priority of safety and stability in the further procedure. For investors and customers, it remains crucial how quickly the damaged infrastructure can be restored and how strictly the ramp-up can be designed within the framework of updated safety protocols.
Market Dependence on Individual Large Mines Highlighted
The situation at Freeport-McMoRan falls into a phase in which the copper market is sensitive to supply reports. In addition to Grasberg, disruptions are also occurring elsewhere: Hudbay Minerals (TSE: HBM) reported the temporary shutdown of a mill at the Constancia site in Peru due to ongoing political protests. Such incidents reinforce the perception of a fragile balance between supply and demand, in which even short-term failures can trigger price impulses. For smelters, traders and industrial end users – from cables to electric motors to renewable energy technology – the question therefore arises of supply chain management, hedging and inventory planning.
Strategically, Freeport-McMoRan also refers to the growing importance of leaching technologies in copper extraction. Even if no detailed key figures are mentioned in the current report, the company indicates that corresponding processes could become more important – especially where they improve the profitability of certain resources or stockpile materials. For the global market, progress in this field would be a potential contribution to making additional units available in the medium to long term; in the short term, however, the immediate effects from Grasberg dominate the perspective.
Conclusion: Freeport-McMoRan’s Force Majeure in Indonesia has noticeably moved the copper price upwards and reveals the market’s dependence on individual large mines. With the temporary production stoppage in the Grasberg Block Cave, the adjusted quarterly targets and the reference to a delayed return to normal operations until 2027, Freeport-McMoRan faces operational and planning challenges. At the same time, the view of Peru shows that other producers can also be negatively affected by external factors. For the copper market, this means: Supply risks remain present – and further developments in Grasberg will be closely monitored in the coming quarters.
