Comex Copper Stocks Surge to Record High on US Arbitrage Reopening

Comex Copper Stocks Climb as Arbitrage Opportunity Reopens

Comex copper stocks have reached a record high as traders exploit renewed arbitrage opportunities. Inventories on the COMEX rose to 603,745 short tons this week. This level surpasses the previous peak recorded earlier in March.

The reopening of the arbitrage between COMEX and the London Metal Exchange has driven strong inflows. Copper prices on Comex now exceed those on the London Metal Exchange. As a result, traders have redirected shipments toward US warehouses.

Meanwhile, market participants continue to monitor price spreads closely. The arbitrage window has created a profitable route for physical copper flows. Therefore, US inventories have expanded rapidly in recent weeks.

US Arbitrage Sustains Copper Inflows Amid Tariff Uncertainty

The Comex copper stocks rally reflects ongoing uncertainty around US trade policy. Earlier expectations of tariffs on refined copper encouraged shipments into the United States. Although authorities granted temporary exemptions, policymakers continue to review the measures.

New Orleans Emerges as Key Hub for Comex Copper Stocks

New Orleans has become the central hub for Comex copper stocks growth. The city now holds over two-thirds of total exchange inventories. This concentration highlights logistical advantages and storage capacity in the region.

Furthermore, analysts at Mercuria expect continued inflows until at least July. A final decision on potential tariffs could reshape trade flows again. However, traders will likely maintain shipments while the arbitrage remains open.

As a result, the global copper market faces shifting supply dynamics. Increased US inventories could tighten availability in other regions. This trend may influence pricing structures across major exchanges.

SuperMetalPrice Commentary:

The Comex copper stocks surge signals how quickly arbitrage reshapes global metal flows. Traders respond instantly to price gaps between key exchanges. However, policy uncertainty remains the dominant risk factor. If tariffs materialize, supply chains could shift again abruptly. Market participants should track spreads and policy signals closely to manage exposure.