Copper hit a fresh LME record as US stockpiling drains supply elsewhere, but a bigger structural story is building: AI data centers could push global copper demand toward a supply gap analysts size at up to 30% by 2035.
At a glance
- LME three-month copper hit a fresh record of $14,533 a tonne on September 8, up roughly 16% year-to-date in 2026
- US refined copper imports exceeded 220,000 tonnes in July alone, the highest monthly volume on record, as traders position ahead of a possible 15% US tariff from January 2027
- S&P Global projects global copper demand could rise from about 28 million tonnes in 2025 to 42 million tonnes by 2040, a 50% increase, implying a shortfall approaching 10 million tonnes without major new supply
- The International Energy Agency estimates the copper market could face a supply deficit of around 30% by 2035
What happened
Three-month copper on the London Metal Exchange (LME) touched a fresh record of $14,533 a tonne on September 8, extending a rally that has added roughly 16% to the price so far in 2026. The immediate driver is familiar: US importers pulled in more than 220,000 tonnes of refined copper in July alone, the highest monthly volume on record, as traders position ahead of a possible 15% US tariff on refined copper imports due to take effect in January 2027, draining LME-available stocks toward roughly 90,000 tonnes. But underneath that near-term positioning sits a slower-moving, larger problem that has nothing to do with tariffs. Global copper demand could climb from roughly 28 million tonnes in 2025 to 42 million tonnes by 2040, according to S&P Global -- a 50% increase driven substantially by the electrical infrastructure that artificial intelligence data centers require, from busbars and server-hall wiring to the transformers and grid links needed to feed their power draw. Without a major expansion in supply, that trajectory implies a shortfall approaching 10 million tonnes by 2040 -- roughly a third of today's entire annual demand. The International Energy Agency (IEA) puts the potential copper supply deficit at around 30% by 2035.
The details
Today's record price has an obvious short-term explanation: traders are moving refined copper into the United States ahead of a possible tariff, which has visibly tightened supply everywhere else. But that positioning trade sits on top of a more durable pressure that barely existed in the copper market a few years ago -- demand from artificial intelligence infrastructure.
The reason AI is a copper story, not just a computing story, comes down to what actually sits inside a data center campus. Copper carries the power in from the grid through high-voltage feed lines, distributes it internally through medium-voltage cabling and busbars, connects it to individual servers, and runs through the pumps that keep cooling systems from letting racks of processors overheat. None of that is optional infrastructure -- it is the physical backbone every hyperscale AI campus needs before a single chip can run. S&P Global's projection that global copper demand could climb from about 28 million tonnes in 2025 to 42 million tonnes by 2040 -- a 50% increase -- reflects that electrical buildout scaling alongside AI capital spending, not copper demand growing at its historical, more gradual pace.
What makes this different from an ordinary demand cycle is the mismatch in how fast each side can move. A technology company can announce a multibillion-dollar data-center campus and have construction underway within months. A copper mine cannot respond anywhere near that quickly: the IEA estimates it takes roughly 17 years to carry a discovery through permitting, financing and construction to first production. Demand can accelerate on a corporate earnings-call timeline; supply is still working on a geological and regulatory one. That gap is the actual mechanism behind the IEA's estimate of a roughly 30% supply deficit by 2035 -- not a shortage of copper in the ground, but a shortage of copper that can physically reach the market before AI-driven demand gets there first.
Seen through that lens, the current US stockpiling looks less like an isolated tariff trade and more like an early, imperfect hedge against the same long-run scarcity. Traders positioning for a tariff today are also, whether deliberately or not, holding onto a metal that multiple independent forecasters expect to be structurally tighter within a decade. That is a meaningfully different read than treating the stockpile purely as arbitrage: it means demand for physically holding copper could persist even in a world where the tariff itself never takes effect, because the longer-run scarcity case does not depend on US trade policy at all.
None of this is a certainty. Both the S&P Global demand path and the IEA's deficit estimate assume AI infrastructure spending continues roughly on its current trajectory, and assume mine development doesn't accelerate meaningfully beyond its historical pace. A slowdown in AI capital spending, or new supply -- from recycling, faster permitting, or projects already in the pipeline -- coming online faster than the 17-year norm, could narrow the gap considerably. But those are the two variables that matter for where copper goes from here, not whether Washington confirms a tariff.
Why it matters
For Indian wire and cable manufacturers, EV and electronics makers, and anyone planning multi-year copper procurement, the AI-driven demand case matters more than the tariff headline: if S&P Global's and the IEA's projections hold even partially, today's record price could mark an early stage of a longer, structurally driven repricing rather than a one-off spike tied to a single US policy decision.
Our read
Outlook: bullish. Copper's fresh LME record is currently being driven by tariff-related US stockpiling, but S&P Global and the IEA both point to a structurally growing demand base from AI data-center buildout running up against a mining industry that needs roughly 17 years to bring new supply online -- a mismatch that could keep upward pressure on prices well beyond any single tariff decision, though the scale of that longer-run gap depends on AI capital-spending trends that could still shift.
What to watch
- S&P Global and IEA updates to their copper demand and deficit projections as AI infrastructure spending plans evolve
- The pace of new copper mine permitting and construction relative to the roughly 17-year discovery-to-production timeline the IEA cites
- Whether US refined copper import volumes continue climbing or start to normalize once tariff clarity emerges
- LME visible inventory levels as an indicator of how much of the current tightness is positioning versus genuine scarcity
For information only, not investment advice.
Copper price in India
metalscost.com India reference price as of 2026-10-03.
Detailed analysis
Timeline
- 2026-07: US refined copper imports reach a record monthly high, exceeding 220,000 tonnes, as traders position ahead of a possible US tariff.
- 2026-09-08: LME three-month copper touches a fresh record of $14,533 a tonne, up roughly 16% year-to-date.
Demand Drivers
AI data centers require copper throughout their entire electrical chain -- high-voltage lines feeding the campus, medium-voltage internal cabling, busbars, server connections, cooling-system pumps, backup power and grid transformers -- which S&P Global cites as a substantial driver behind its projection that global copper demand could rise from about 28 million tonnes in 2025 to 42 million tonnes by 2040.
Supply Drivers
The International Energy Agency estimates a new copper mine takes roughly 17 years to move from discovery to production, a timeline that cannot accelerate to match AI data-center construction, which can go from announcement to build-out within months -- the core mismatch behind the IEA's projected 30% supply deficit by 2035.
Inventory Drivers
US refined copper imports exceeded 220,000 tonnes in July, the highest monthly volume on record, pulling metal into American warehouses and draining LME-available stocks toward roughly 90,000 tonnes -- a near-term tightening that sits on top of, and is separate from, the longer-run AI-driven demand pressure.
Trade Tariffs
US traders are moving refined copper into the country ahead of a possible 15% tariff on refined copper imports that could take effect in January 2027, which explains the immediate spike in US import volumes but is a separate mechanism from the AI-driven structural demand growth this piece focuses on.
Global Consumption
S&P Global projects global copper demand rising from about 28 million tonnes in 2025 to 42 million tonnes by 2040, a 50% increase over 15 years, substantially attributed to AI data-center electrification -- a materially steeper growth path than copper's historical multi-decade demand trend.
What could lift prices
- LME copper set a fresh record of $14,533 a tonne on September 8, up roughly 16% year-to-date in 2026
- S&P Global projects global copper demand could rise 50% by 2040 (28 million to 42 million tonnes), driven substantially by AI data-center electrical infrastructure
- The IEA estimates a potential 30% supply deficit by 2035, since new mines take roughly 17 years from discovery to production versus a data-center campus that can be built within months
- Current US stockpiling (more than 220,000 tonnes imported in July) is draining LME-available stocks toward roughly 90,000 tonnes, tightening a market that AI-driven demand is set to grow into further
What could weigh on prices
- The 2035 and 2040 demand and deficit figures are projections tied to AI capital-spending trajectories continuing at their current pace, which could slow if hyperscalers pull back build-out plans
- Some of today's price strength reflects tariff-driven positioning rather than physical AI demand today, and the current US stockpile could unwind quickly if the tariff threat is resolved or dropped
Country impact
| Country | Impact | Reason |
|---|---|---|
| United States | High | US tariff positioning is concentrating current copper supply domestically at the same time the country hosts a large share of global AI data-center buildout, layering structural long-run demand on top of the current stockpiling trade. |
Industry impact
| Industry | Effect | Reason |
|---|---|---|
| Mining | Positive | A demand trajectory toward 42 million tonnes of global copper use by 2040 strengthens the investment case for new production, even though the roughly 17-year discovery-to-production timeline limits how quickly miners can respond. |
| Technology | Negative | A widening copper supply-demand gap driven by AI data-center buildout raises the cost of the electrical infrastructure -- busbars, cabling, transformers and grid connections -- that the same hyperscale campuses depend on to operate. |
Who gains, who loses
- Established copper miners with producing assets: A roughly 17-year timeline from discovery to production means existing producers face limited near-term competition from new supply even as demand projections climb toward 42 million tonnes by 2040.
- AI data-center developers and operators: Rising and potentially scarcer copper raises the cost of the busbars, cabling, transformers and grid connections that hyperscale campuses depend on to operate, a bottleneck several analysts have flagged directly.
Other ways this could play out
- If AI infrastructure spending continues to scale as currently projected and new mine supply doesn't accelerate meaningfully beyond its typical 17-year development timeline, the market could move toward the IEA's roughly 30% 2035 deficit scenario, keeping copper prices structurally elevated well beyond any single tariff decision
- If a slowdown in AI capital spending or faster-than-expected new mine and recycling supply narrows the projected gap, current record prices could prove to have been pulled forward by near-term positioning rather than justified by underlying long-term scarcity
Price risks
- A slowdown in AI data-center capital spending could reduce the demand growth underpinning the 2035 and 2040 deficit projections
- Faster-than-typical new mine development or recycling growth could narrow the projected supply gap
- Resolution of the US tariff question, in either direction, could unwind some of the current stockpiling-driven price premium
Historical comparison
- 2025 vs 2040 global copper demand: S&P Global's projected rise from about 28 million tonnes of global copper demand in 2025 to 42 million tonnes by 2040 would be a roughly 50% increase over 15 years, a markedly steeper trajectory than copper's historic multi-decade demand growth rate.
Technical view
Price is mixed relative to its 20-period and 50-period moving averages, showing no clear trend alignment.
Computed from metalscost.com's own stored price history.
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