Prolonged Iran war would hammer top copper miners

Geopolitical Shockwave Threatens Copper's Price Stability

A protracted conflict involving Iran, particularly one that impedes vital shipping through the Strait of Hormuz, presents a significant downside risk for the global copper market. Analysts at (BI) have outlined scenarios where a sustained escalation, driving crude oil prices past the $150 a barrel mark, could trigger a substantial slowdown in economic expansion. This demand suppression, coupled with potential supply chain disruptions, is projected to limit copper's consumption growth to a meager 0.5%–1%.

Under such dire conditions, the price of copper could tumble below the critical $10,000 per tonne threshold. This would not only depress market values but also create a refined surplus estimated between 100,000 and 200,000 tonnes. The ramifications for leading copper miners are stark; BI's modeling suggests potential earnings contractions of approximately 20% for Southern Copper, a steeper 32% for Antofagasta, and a considerable 55% for First Quantum.

These projected earnings declines stem from the dual pressures of elevated operational costs, largely driven by energy price inflation, and a weaker pricing environment than currently factored into market consensus. Southern Copper's resilience in this downside scenario is attributed to its inherently low-cost operational structure. In contrast, First Quantum faces heightened vulnerability, exacerbated by its higher cost base and the ongoing uncertainty surrounding the operational status and projected contribution of its Cobre Panama mine, which is not anticipated by consensus to be a significant factor until 2027.

Producer Vulnerability and Input Cost Pressures

The BI analysis emphasizes that the longer the conflict persists beyond a year, and the more constrained Strait of Hormuz flows become, the greater the exposure of higher-cost producers to the realities of cooling demand. This dynamic would inevitably reveal the vulnerabilities along the industry's cost curve.

Grant Sporre, global head of metals and mining at BI, commented on the delicate balance, stating, “While copper’s long-term fundamentals remain intact, near-term pricing and margins are highly sensitive to energy-driven inflation and supply disruptions.” This sentiment underscores the interconnectedness of geopolitical events, energy markets, and base metal valuations.

The potential for Middle Eastern geopolitical tensions to impact commodity markets is a critical reminder. Copper finds itself in a precarious position, caught between the prospect of faltering demand and the reality of constrained input supplies, such as sulfur, which is essential for smelting operations. Even as the global economy diversifies away from direct oil dependency, the inflationary pressures stemming from elevated energy prices could reignite broader inflation concerns. This, in turn, could postpone anticipated interest rate cuts and dampen industrial output, thereby capping any upside potential for copper while simultaneously squeezing profit margins across the entire mining sector, the analysts caution.

BI's scenario modeling also explores different conflict durations. A conflict spanning multiple months, while less damaging than a prolonged war, would likely see copper markets remain relatively balanced through 2026, with prices fluctuating between $10,500 and $11,500. A swift resolution, however, could potentially re-establish a modest deficit, lending support to prices near the $12,000 level.

Current inventory levels, sitting near 1.4 million tonnes, are a tangible signal of softer demand and a buyer's market. This suggests that any upward price momentum may be capped until these stockpiles are drawn down to more normalized levels. BI had already revised its global demand growth forecast for 2026 downwards to 2%–2.3%, citing affordability concerns driven by high prices. They further warn that increasing mined supply may prove challenging, even with an allowance for 1.1 million tonnes of disruption, due to persistent operational stoppages at major mining sites.

Market Ripple Effects

Despite the demand-side headwinds, supply risks could offer some partial counterbalance. Potential disruptions to sulfur shipments originating from the Gulf Coast could constrain production in the Democratic Republic of Congo, where a significant portion of output, between 50% and 60%, is reliant on sulfuric acid. Such constraints could mitigate the scale of any potential surplus.

Furthermore, the ongoing challenges at mines and a tight concentrate market environment could impede any substantial increase in supply during 2026. The issue of rising costs remains a central concern for the industry. BI estimates that a prolonged conflict could inflate unit production costs by 10% to 20%, with sulfuric acid and other critical inputs contributing to this broader inflationary trend.

High-cost producers might witness their profit margins shrink dramatically, potentially compressing from approximately 70% in 2025 to around 40% in 2026. This would bring their all-in margins close to long-run historical averages, raising the specter of reduced capital expenditures and delays in project approvals. The outlook for Chinese demand adds another layer of complexity. A key indicator for Chinese copper consumption fell to a multiyear low late last year, signaling a projected growth rate of only 0.5% to 1% for 2026, a notable deceleration from 2025 levels, as the property sector's weakness and subdued industrial activity continue to weigh on consumption.

The overarching conclusion is that while copper's fundamental long-term deficit narrative may not be entirely derailed, it could be postponed. Short-term geopolitical shocks are actively reshaping demand dynamics, cost structures, and the timelines for crucial investment decisions across the industry.