Copper’s Giant Tariff Trade Is Back and Squeezing Global Market

Why It Matters

The renewed tariff speculation forces copper into the US, tightening global supply and pushing prices higher, which could reshape trade flows and profitability for miners, traders, and end‑users.

Key Takeaways

• US copper imports could rebound to 150,000‑200,000 tons monthly
• Comex premiums exceed $500 per ton over LME cash prices
• Potential 15% tariff from 2027 may tighten global copper supply
• Shipping delays at Panama Canal add logistical pressure on US deliveries

Pulse Analysis

The copper market is entering a second wave of tariff‑driven arbitrage, echoing the 2022 surge when traders rerouted metal to the United States to capture Comex premiums. With the Comex‑LME spread now topping $500 per ton, the economics of shipping even marginal tonnage become attractive, prompting industry players like Trafigura to pull hundreds of millions of dollars of copper from LME warehouses—the largest withdrawals recorded since 2013. This price differential is not solely a function of tariff talk; renewed investor enthusiasm for copper, fueled by AI‑related demand forecasts, has also lifted speculative positioning to its strongest level since 2020.

Policy uncertainty remains the catalyst. The Commerce Department’s June 30 deadline could set the stage for a 15% duty on refined copper beginning in January 2027, a figure already recommended in a prior administration report. If enacted, the tariff would effectively shrink the global supply pool available to LME participants, forcing a sharper drawdown of inventories, especially as China’s stockpiles already show signs of depletion. Traders anticipate that the prospect of such a duty will sustain high import volumes to the US, creating a feedback loop that reinforces Comex premiums and pressures downstream manufacturers reliant on lower‑cost LME pricing.

Logistical constraints are amplifying the market’s bullish outlook. Disruptions linked to the Iran conflict and chronic congestion at the Panama Canal have lengthened transit times for South American copper, raising freight costs and limiting the speed at which shipments can reach US ports. These bottlenecks, combined with the tariff narrative, are likely to keep the copper price trajectory upward, compelling miners to reassess production schedules and investors to factor tariff risk into valuation models. Stakeholders across the supply chain should monitor policy developments and freight dynamics closely, as they will dictate the next phase of price volatility in the $300 billion‑a‑year copper market.