Copper: the perfect squeeze?

LME cash copper held around $13,500 a tonne in mid-July, up roughly 10% year-to-date, after touching records near $14,500/t earlier in 2026. That resilience sits on top of two forces: a mine-supply base that is visibly struggling to grow, and a demand picture, supported by an "AI supercycle". Our reading is that copper is structurally tight, and could be much tighter in the near future.

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AI is copper's new marginal buyer — even as China cools

The demand case has acquired a second engine alongside electrification. The largest cloud and platform companies are on course to spend roughly $725–750 billion of capital in 2026, up around 70% on the year, and increasing more by 2027. The overwhelming majority of it on data-centre capacity and the chips inside it. Whatever the return on that spend sometimes questioned as a buble, its physical footprint is real, and copper is one of its hardest inputs to design out.

AI-optimised facilities are markedly more copper-intensive than the cloud data centres that preceded them. High-density GPU racks distribute power through heavy copper busbars rather than conventional cabling, liquid-cooling manifolds and bus-work add further copper, and the grounding and interconnect requirements of multi-billion-dollar clusters are larger again. A useful real-world anchor is Microsoft's Chicago campus, which embeds roughly 2,177 tonnes of copper across about 81 MW — close to 27 tonnes per megawatt of capacity. That ~27 t/MW figure is a reasonable facility-level benchmark for a modern build; AI-dense halls run higher, in the 30–45 t/MW range, once heavier power delivery and cooling are included. Crucially, none of this counts the grid connection — substations, transformers, redundant feeds and transmission — which can add anywhere from the same amount again to several multiples per megawatt when a campus forces new network build.

The global operational data-centre base is on the order of 100 GW and expanding at a mid-teens-to-20% pace as AI build-out accelerates, implying something like 15–20 GW of new capacity commissioned this year. Applying a facility-level intensity of 27–40 t/MW to that range gives roughly 300,000 to 700,000 tonnes of copper embodied in 2026 data-centre construction, with a central figure near half a million tonnes. Of that, the genuinely AI-specific uplift — the extra copper from higher-intensity designs plus the capacity AI is pulling forward that would not otherwise have been built — is on the order of 100,000–200,000 tonnes. The grid reinforcement needed to actually power these sites is a further 300,000–500,000 tonnes, though that copper is shared with the wider electrification build and should not be double-counted as "data-center demand."

Put in context, the central ~500,000-tonne facility figure is under 2% of the roughly 28.7 million tonnes of refined copper the world will consume this year — small against the stock. Global copper demand is growing only about 1.6% in 2026, or roughly 450,000 tonnes. On that basis, data-centre construction alone is absorbing an amount of copper equivalent to essentially the entire year's growth in global consumption — before the grid build-out on top. AI is not yet a large share of copper demand; it is a dominant share of the marginal tonne. And in a tight market, the marginal tonne sets the price.

Two features make this demand unusually price-insensitive. First, copper is a trivial share of a hyperscale project's cost: a $50,000-per-megawatt copper bill is a rounding error against a campus that can run past $10 billion, so builders are effectively indifferent to whether copper trades at $10,000 or $20,000. Second, the electrical and safety requirements of high-density power delivery leave limited room to substitute inside the rack. That combination — large marginal demand, near-zero price elasticity — is what makes the theme a genuine structural support rather than a cyclical one.

Against that structural pull runs a cyclical drag from China, still around 58% of global refined demand. Property remains in contraction, passenger-vehicle sales fell about 19% year-on-year and home-appliance sales grew just 1% in the first five months of the year. Yet copper is behaving as the exception among base metals: Shanghai exchange inventories have drawn down in 2026 even as other metals accumulate, supported by a surge in State Grid investment — power-grid spending up an estimated 35–40% year-on-year — that is offsetting the property and solar downturn. Refined-copper imports rose about 3% year-on-year in June to 478,000 tonnes, the strongest month since September 2025, while copper-concentrate imports slid to a 19-month low and smelter treatment charges have gone negative. The signal is not a demand collapse but a rotation: China's copper pull is narrowing onto the grid and electrification, precisely the copper-intensive end of the economy, while construction and consumer channels fade.

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