Copper Supply Squeeze: Mines Falter as Demand Surges

Copper is back in the spotlight as prices climb towards record highs and a series of mine disruptions collides with unrelenting demand from smelters.

Copper is typically regarded as a background industrial metal, yet is now at the centre of a strategic squeeze that is rippling through global supply chains.

From Indonesian pit walls to Chinese smelter towns and US warehouses, fractures are opening up between where copper is produced, processed and consumed.

In Indonesia, a fatal mudslide at Grasberg, the world’s second‑largest copper mine, triggered force majeure in September and halted the Grasberg Block Cave, which accounts for about 70% of previously expected production and is not set to restart until the second quarter of 2026.

In Chile, production guidance at the Quebrada Blanca mine has also been cut due to operational problems, tightening global availability further.

This follows a prediction made late last year by Gregory Shearer, Head of Base and Precious Metals Strategy at J.P. Morgan: “Our 2026 mine supply growth estimates have fallen to only around +1.4%, or about 500 kmt lower than our estimates at the beginning of the year. The supply picture is tightening just as downstream capacity and demand expectations continue to climb.”

This tightness is playing out against a dislocated inventory backdrop. The US front‑loaded imports earlier in the year and is now sitting on swollen stocks of refined metal.

Mined supply growth constrained

Yet the prospect that refined copper could be hit by Section 232 tariffs means US prices have remained above the London Metal Exchange benchmark.

“This open arbitrage not only locks this excess inventory in the US for now, but it also works to still attract marginal additional imports to the US,” Gregory says.

China’s demand could become a decisive factor. In previous bull cycles, domestic consumption softened and Chinese smelters pushed more refined copper abroad.

This time, the underlying set‑up looks different, with disruptions expected to linger and mined supply growth constrained.

Gregory says: “More acute supply disruptions are likely here to stay for multiple quarters at the very least, which we think limits China’s ability to fully wait out higher prices.

“Moreover, we are already tracking a rollover in Chinese refined copper production and there still remains significant potential that Chinese smelters find themselves short of units of copper raw material, driving a long-hypothesized reversal in refined production growth.

“Hence, we do think there will come a point soon where China will likely have to reluctantly increasingly buy into stronger copper prices.”

Against this backdrop, smelters, particularly in China, are still operating at historically high rates.

Refiners are producing record volumes of metal despite a shortage of copper concentrate, widening the gap between what mines can supply and what smelters are configured to process.

A chain out of alignment

With mined supply under pressure, higher prices have pushed more scrap and alternative feedstock into the system.

Strong pricing for by‑products such as sulphuric acid is also shoring up plant economics and supporting high utilisation, even as access to concentrate tightens.

The result is a chain that has fallen out of alignment. Upstream bottlenecks are constraining raw material, but smelters remain reluctant to scale back and are competing aggressively for feedstock.

Treatment and refining charges have dropped sharply, eroding midstream margins as operators accept weaker economics to secure material and keep assets running.

Over the past decade, smelting capacity, again led by China, has grown faster than mining output.

That expansion now means a larger number of plants chasing limited concentrate, while miners gain more pricing power and negotiating leverage over contracts and terms.

The imbalance is also distorting how price signals are interpreted.

As more refined copper is produced and moves into storage, headline inventories in some locations are building, even though the upstream market remains tight and disrupted.

Prices stay elevated, but the physical picture looks uneven across regions and segments.

Increased upstream pressure

Phil Flynn, Senior Market nalyst at the Price Futures Group, says: “Copper may be the most important commodity in the world right now when it comes to the artificial-intelligence revolution - without copper, none of it will be possible. We’re seeing more investment in copper, and people who didn’t pay attention to copper are now focused on it.”

For manufacturers, utilities and technology firms, the stakes are high. Copper underpins construction, electronics, power networks, electric vehicles and data‑centre infrastructure, so strains at any point in the chain can ripple through sourcing strategies, input costs and delivery schedules.

Looking ahead, electrification, renewable energy build‑out and infrastructure spending are set to increase copper consumption further. That will add pressure to an upstream sector already struggling with disruptions, permitting challenges and slower‑than‑expected output growth.