Copper Futures Fall as Strait Closure Strands 40,000 Tons. 4/7/26

Why It Matters

Tightening supply and eroding refiners’ margins threaten copper price stability, impacting manufacturers, traders, and investors reliant on the metal’s benchmark.

Key Takeaways

• May copper futures slipped for second session in three
• Chinese warehouse inventories dropped over 30% since mid-March
• Strait of Hormuz closure removes ~40,000 tons monthly supply
• Treatment charges at razor‑thin levels, squeezing refiners’ margins
• Declining margins weaken global demand, pressuring copper prices lower

Summary

May copper futures slipped for a second session in three, after a brief rally off the 200‑day moving average that lifted prices 9.17% from March 23 to April 2. The contract traded between $553.90 and $564.10 on Thursday, ending near the day’s low, as market participants digested fresh supply‑side stress.

Chinese warehouse inventories have been drawn down sharply, falling more than 30% since mid‑March to roughly 300,000 tons. The pull‑through suggests fabricators are tapping exchange warehouses rather than buying refined copper at elevated spot prices. Meanwhile, the closure of the Strait of Hormuz has stranded an estimated 40,000 tons of copper each month that normally flows from Middle‑Eastern smelters, adding an unusual supply headwind.

Treatment charges, already at razor‑thin levels before the geopolitical shock, are being squeezed further by rising power costs, eroding refiners’ margins. Stranded shipments mirror the energy market’s bottleneck, and the combination of thin charges and higher electricity bills is dampening refiners’ appetite for new production.

The confluence of a shrinking inventory buffer, constrained shipments, and collapsing margins is likely to keep copper prices under pressure, raising costs for manufacturers and prompting investors to reassess exposure to industrial metals. Continued disruptions in the Hormuz corridor could deepen the supply gap, while any rebound in Chinese demand may be muted until margins improve.

Original Description

May Copper futures fell for the second session in the last three, rotating lower after a 9.17% rally off the 200-day moving average. The market faces unique supply-side pressures as the closure of the Strait of Hormuz strands an estimated 40,000 tons of copper per month from Middle Eastern smelters. Meanwhile, Chinese copper inventories have drawn down by over 30% since mid-March, falling to roughly 300,000 tons. This suggests fabricators are actively pulling metal from exchange warehouses to avoid elevated open-market prices. Compounding the fundamental pressures, treatment charges remain thin and rising power costs are squeezing margins, weakening global demand from refiners and pushing futures prices lower.

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