One metal, different inventory measures
A full copper warehouse does not establish that the metal is close to its eventual buyer. Reuters’ October 14 analysis reports that warehouses approved by US futures exchange Comex hold roughly 70% of visible exchange copper stocks worldwide. An industrial user’s first question is therefore where the required metal is waiting. A price gap associated with prospective import tariffs had pulled copper into the United States. That accumulated stock now forms the background to a different shipping calculation: the incentive to send another tonne to the same destination is shrinking.[1]
The inventory measures first need separating. Comex warehouses contain more than 714,000 tonnes. Macquarie’s estimate of approximately 1.6 million tonnes for the United States covers stocks both on and off exchange. Adding those figures would risk counting the same metal again: the second measure has broader coverage. Likewise, visible global exchange inventory is not a census of usable copper inside every industrial warehouse. The report establishes a substantial geographical concentration; it does not measure the immediately available metal held by each buyer.[1]
New arrivals and withdrawals of existing stock
The calculation at the shipping gate has changed too. The Comex premium over the London Metal Exchange has narrowed to about $310 a tonne, compared with more than $3,000 in July 2025. Freight, insurance and other expenses must be covered by that difference. Wood Mackenzie analyst Charles Cooper says the narrowing weakens the incentive to send additional metal to the United States. A screen price thus connects to a physical decision: does the extra revenue at the destination cover the cost of moving the cargo? A smaller gap can weaken the existing route’s commercial pull.[1]
But a weaker incentive for new arrivals does not prove that accumulated metal is already moving out. Actual withdrawals and shipments are needed to establish that reversal. Reuters reports that no refined-copper tariff decision has been announced. Macquarie analyst Alice Fox’s assessment that a decision may be delayed is a scenario. Continuing uncertainty does not support assuming an immediate redistribution merely because the price gap has narrowed. The location of existing stock and the direction of the next flow remain separate questions.[1]
The concrete distinction to track is where warehouses fill and empty alongside the price gap. Shipments redirected to other markets could ease geographical concentration; weaker demand could relieve local pressure through a different channel. The dollar, interest rates and industrial demand can also influence prices. This inventory picture alone cannot establish a price direction. Its narrower implication is that metal counted in a global total and metal deliverable to a particular user are different measures. Subsequent warehouse and shipment data must test whether that accessibility gap is changing.[1]