AI’s Power Demand Is Testing the U.S. Grid
Copper has spent August doing what people in the industry call its "Doctor Copper" job: showing signs of trouble in the broader economy before anyone else mentions anything. Currently, buyers who need the metal immediately are paying more than buyers willing to wait a month, paying as much as $370 a ton more- the biggest gap between "now" and "later" prices since a similar squeeze affected the market in 2021. That gap gets larger when you compare today's price to prices three months out, suggesting that people who need physical copper in hand, rather than a contract, are feeling pressure. U.S. prices have followed the same path, climbing toward record highs briefly in January, and now traders are split on whether copper's recent record price holds as a ceiling or gets broken again.
Why is supply tight?
Warehouse stockpiles tracked by the London Metal Exchange have been shrinking for 42 days, the longest streak of declines in over a decade, and they're down to a level low enough that nearly half of what's left is already spoken for. That's a thin cushion for such a large market. At the same time, available copper is being pulled in competing directions: traders are moving metal towards the U.S. ahead of potential import tariffs, while Chinese demand for material is increasing as smelters respond to tighter concentrate availability following restrictions from the Democratic Republic of Congo. On top of that, a major smelter in Indonesia has been offline after equipment damage, and Chile, the world's largest copper-producing country, just posted its weakest quarterly output in nineteen years, with its state mining company's chairman signaling that a quick return to old production levels isn't realistic.
The DRC’s involvement
It's worth pointing out that the Congo export ban, despite headlines, affects only a small piece, well under a fifth, of the country's total copper output, and some analysts don't think it should move global supply numbers on its own. That mismatch between a limited restriction and an outsized market reaction says less about Congo and more about how little breathing room exists everywhere else. When stockpiles are already low, even a small disruption is enough to send buyers scrambling to secure whatever physical metal remains in warehouses, which is what's playing out today.
How does this relate to policy?
All of this is unfolding alongside a broader push in Washington to secure critical minerals. In late July, the administration used emergency wartime-era authority to restrict exports of critical minerals produced domestically, a more formal and forceful step than the tariff discussions that came before it. U.S. manufacturers and defense contractors are also racing against a January 1, 2027 deadline to cut their reliance on Chinese-sourced minerals, a target many analysts doubt the industry can hit without some kind of exception. Copper isn't the only material caught up in this shift, but because it's central to both the buildout of electric infrastructure and the current boom in AI data centers, it's the clearest example of national security policy and physical scarcity colliding.
What we're watching
One major research firm has already raised its full-year 2026 copper price forecast, citing "strong upside risks," and says the biggest thing to watch is how the tariff decision shakes out. A phased introduction of tariffs could prolong the incentive to hold or move copper into the U.S., supporting elevated regional prices. A reversal of the policy, however, could unwind part of that premium, particularly given the unusually large stock of copper already accumulated in U.S. warehouses. The key risk is therefore not any single mine disruption, export restriction, or tariff decision, but the combination of all three against an already depleted inventory base. With little spare physical supply available, relatively small shocks are having increasingly large effects on near-term pricing, making copper one of the clearest examples of how critical-mineral scarcity is becoming a market as well as a strategic-policy issue.
Data Sources
- Bloomberg — Copper Prices Surge as LME Spot Premium Hits Highest Level Since 2021 Squeeze
- MINING.com — Copper Price Holds Near Record as London Warehouse Bidding War Looms
- Bloomberg — Copper Heads for New Highs as US and China Squeeze Buffers
- Geomechanics.io — Copper Price Near Record: LME Warehouse Squeeze and Project Signals for Engineers
- Trading Economics — Copper Price, Chart, Historical Data and News
- National Mining Association / Origin Brief — Critical Minerals & Mining Weekly Report