The copper market is tightening sharply. The London Metal Exchange's front-month contract traded at a premium of as much as $370 per ton over September futures on Friday, according to data highlighted by The Kobeissi Letter, the widest one-month spread since the 2021 squeeze that forced the exchange into emergency intervention. The premium means traders are paying a historic markup simply to secure copper they can take delivery of immediately rather than months from now.
The pressure extends across the curve. The closely watched cash-to-three-month spread reached $434 a ton, also a five-year high, with cash copper changing hands at a record near $14,500 a ton. Exchange data shows LME warehouse stockpiles have fallen for 42 consecutive trading days, the longest continuous decline since 2014.
Several forces are converging to drain available supply at once. The Democratic Republic of Congo, one of the world's largest copper and cobalt producers, has officially banned exports of copper and cobalt concentrates, tightening feedstock availability at the source. At the same time, traders have been pulling metal out of LME warehouses to ship to the United States ahead of potential Section 232 tariffs, and to China to fill smelter feedstock gaps left by Beijing's crackdown on scrap copper imports. Live LME copper pricing is published on the exchange's own copper market page.
An Echo of 2021, With Different Triggers
The current squeeze inverts the usual playbook for supply shocks: rather than one dramatic event draining stockpiles, this tightening is the product of several policy and logistics decisions arriving at once, an export ban, tariff-driven front-running, and a scrap-import crackdown, each independently reducing how much metal is available on the LME's own books.
Why It Matters Beyond Metals Traders
Copper is a foundational input for electrification, from EV wiring to grid infrastructure to data-center buildouts, so a sustained premium of this size tends to feed through into higher costs across industries far removed from commodities trading desks. If the export ban and tariff dynamics persist, the current squeeze could prove more durable than 2021's, which eased once the immediate supply shock passed.
