The price of copper has risen 47% over the past twelve months and 17% so far this year. Stockpiling, meaning the deliberate accumulation of reserves beyond immediate consumption needs, is supporting that rally in the United States. On the other side of the ledger, aging mines are struggling to match a demand curve that keeps moving up.
Where the demand is coming from
Copper carries electricity. That single fact explains why three expanding sectors are pulling on the same metal at once. AI data centers require significant copper for power distribution and internal wiring. Power grids are being upgraded and extended. Renewable energy infrastructure, covering solar installations, wind farms, and the transmission lines that connect them to the broader grid, adds a third draw.
What matters about that list is not its length but its timing. All three sectors are growing simultaneously. Under normal conditions, softness in one area tends to offset pressure in another. The current picture does not show that pattern.
Why mines cannot close the gap
A mine has a productive life. As it ages, the ore that remains is typically harder to reach and more expensive to extract. Output falls unless operators make major new investments. The mines producing copper today are old, and they are falling short of what the demand increase requires. Bringing new capacity online takes years of permitting and construction, so there is no rapid correction available.
U.S. stockpiling adds a separate layer of pressure. Buying copper to hold rather than to use immediately draws metal off the market without adding any corresponding production. That means stockpiling demand sits on top of existing industrial demand, not beside it.
The 47% gain over twelve months, with 17% of that coming in the current year, is what the combination of constrained supply and expanding demand produces in practice.