Copper Deficit Deepens on Chile Storms & DRC Export Ban: What Confirms the Rally?

• LME copper hit a record $14,201/tonne, up 0.7% and on track for a sixth straight weekly gain as supply shortages continue to outweigh demand concerns.
• BofA said weak mine growth and Chile's disruptions, rather than stronger demand, are driving the rally, supporting producers with near-term copper exposure while shortages persist.
• Antofagasta's H1 output fell 9.5% to 285,000 tonnes after Chile storms disrupted mining operations, highlighting how weather can quickly tighten supply from the world's largest copper-producing region.
• Bloomberg Intelligence's downside case is that stronger Chinese production could offset supply losses elsewhere, limiting further gains despite geopolitical risks.
• Key confirmation signal: the LME cash-to-three-month spread reached $150/tonne, its widest since October 2025. A narrowing spread would indicate the supply squeeze is beginning to fade.

Physical Supply Tightens & Copper Hits a Record: Why the Rally Isn't Demand-Driven

Copper hit a record $14,201/tonne on the LME, up 0.7% and marking a sixth straight weekly gain, its longest winning streak since 2020. US copper futures briefly reached nearly $6.90/lb before pulling back, showing supply shortages, rather than speculative demand, are driving price volatility.

The rally reflects tightening physical availability across major markets. The LME cash-to-three-month spread widened beyond $150/tonne, its highest since October 2025, signaling buyers are paying a premium for immediate delivery. In Shanghai, the cathode-to-scrap spread widened by 660 yuan to 4,685 yuan/tonne as scrap inventories tightened, confirming that physical shortages continue to support copper prices despite growing market caution.

Mine Disruptions & Export Restrictions Extend Copper Shortages: Why New Supply Can't Respond 

Chile, the world's largest copper producer, became the first major source of supply disruption. Heavy snow, rain and high winds forced Codelco, Antofagasta and Anglo American to limit mining activity. Antofagasta's first-half output fell 9.5% to 285,000 tonnes, while BHP warned Chilean production could decline further next year. With a new copper mine typically taking about 10 years to develop, lost production cannot be replaced quickly.

Government policy is adding to the supply squeeze. The Democratic Republic of Congo banned copper and cobalt concentrate exports to expand domestic processing, while US tariff measures and tighter scrap availability in China further reduced global supply. Together, these disruptions show physical supply, rather than demand, is driving copper prices.

Geopolitical Risks & Tight Inventories Support Copper: What Could Break the Rally?

These supply constraints cannot be reversed quickly because weather disruptions, export restrictions and mine development timelines take time to resolve. ING said tight physical markets, low inventories and constrained mine supply should keep copper prices supported while supply remains tight.

Base case: Chile's mine disruptions and the DRC's export ban keep the LME cash-to-three-month spread above $150/tonne, supporting copper prices near record highs through the second half of 2026.

Bear case: resilient Chinese production offsets supply losses elsewhere, increasing available supply and limiting further gains despite geopolitical risks.

Watch SMM's Secondary Copper Daily Review and China's weekly copper operating-rate data for early signs that restocking is returning or supply shortages are easing.

AI Infrastructure & Copper Shortages Raise Costs: Where Value Is Emerging

Copper shortages are raising costs for downstream fabricators while supporting producers with available metal. China's cathode-to-secondary-rod price gap reached 1,970 yuan/tonne, indicating tighter margins for rod producers that rely on cathode instead of scrap. AI-driven investment in data centers and power grids continues to support copper demand.

Supply-chain behavior remains more informative than price alone. Chinese scrap inventories remain tight, but traders continue delaying purchases, with the purchase sentiment index at 2.01 and the sales index at 2.76. That divergence suggests physical supply remains constrained despite cautious buying.

The timing of Chile's recovery, changes to the DRC's export ban and geopolitical risks remains uncertain. Antofagasta's 9.5% production decline and the typical 10-year mine development timeline continue to support the case for tight supply. A reversal of the DRC's policy or stronger-than-expected Chinese production would be the clearest signals that the supply squeeze is easing.

What the $150 LME Spread Says About Copper’s Next Move

Copper's record price is supported by the LME cash-to-three-month backwardation, which widened above $150/tonne, its highest level since October 2025. As long as the spread remains elevated, physical copper stays scarce, benefiting producers while raising costs for downstream fabricators.

A narrower LME spread or a reversal of the DRC's export ban would signal the supply squeeze is easing by improving metal availability and reducing premiums for immediate delivery.

SMM's Secondary Copper Daily Review and the LME cash-to-three-month spread remain the best public indicators of whether supply is tightening or recovering. Monitoring those indicators provides stronger evidence than reacting to record prices alone.