Copper Prices Surge Amid Tariff Changes
Since launching in 2025, US copper prices have hit all-time highs, largely due to market expectations surrounding a 50% tariff on imported copper products as part of President Trump’s trade strategy. When these tariffs took effect on August 1, the market reacted with confusion, driven by concerns over potential supply disruptions and the rising costs for US manufacturers relying on copper. The hope was that this would finally lead to significant profits for the industry.
Previously, China’s copper demand seemed largely tethered to developments in Asia during 2025. However, it was ultimately the US that shaped the pricing of transition metals. The upward trend in US copper prices was closely tied to movement in the broader metals market, anticipating that copper would face hefty import duties. Between April 1 and July 29, COMEX Copper Futures jumped from $9,667 per ton to $12,355, marking the highest pricing since the Covid-19 recovery began. In contrast, prices on the London Metal Exchange (LME) remained relatively stable, trading at the high end of a five-year range—around $9,600 per ton. The significant discrepancy led to a notable 28% premium on US copper, creating a unique arbitrage opportunity between LME and COMEX contracts.
The widening price gap prompted a shift in copper inventory from the LME to US buyers, significantly reducing regional stocks in Europe and Asia. This movement of copper also impacted inventory levels in Shanghai, showing that much of the copper potentially bound for the US was sourced from Asia. COMEX copper stock levels rose from 97,524 tons on April 1 to 257,915 tons by July 31, while LME stocks dipped from 213,275 tons to 138,200 tons. Similarly, the Shanghai Exchange saw its copper stores fall dramatically from 235,296 tons to 72,573 tons, suggesting a major flow of copper heading toward US markets.
The copper market faced a setback on July 30 when the White House announced a significant exemption from the previously set 50% import duties on copper. The immediate market reaction was notable—COMEX copper futures plummeted over 20% in a single day, dropping from $12,282 per ton to $9,548. This marked the largest daily decline in US copper price history.
The disparity between COMEX and LME prices fell from $2,704 per ton to just $29 on July 31, effectively negating the year’s most lucrative metal ruling. US smelters, who had been accumulating stock in anticipation of tighter supply from the tariffs, now found themselves in a contracting domestic market. This shift hints that inventory flow could reverse, heading back to European and Asian markets.
US mining companies were among those hardest hit. They had anticipated a market in their favor, expecting rising regional prices. Freeport McMoran, the largest copper miner in the nation, had previously enjoyed a boost of $1.7 billion in annual cash flow. However, now operators at Arizona’s Morenci mines are seeing their stock prices decline—down 11% from $43.2 to $38.8 per share since the tariff announcement. Conversely, the news likely offered some relief to major suppliers of copper ore to the US, especially those in Chile, as Chilean copper exports had also notably decreased.
President Trump’s announcement indicated that most copper imports would remain unaffected by the tariffs. The new tariff structure will specifically target products like electronic conductors and copper pipes, accounting for around 28% of US copper-related imports for 2024, valued at about $4.7 billion. The specifics of the tariff appear to carry a subtle anti-Chinese tone, given that 23% of the targeted product value came from China in 2024.
Initially, this exemption was thought to ease pressures on copper smelters struggling with rising prices, as their Chinese and Japanese counterparts could source ore more affordably. It’s no surprise that some US smelters have cautioned against blanket tariffs since April, while the situation looked bleak for many US copper miners, as COMEX prices aligned more closely with LME rates. However, not every miner feels the tightening squeeze evenly; smelter operators might find some economic relief from lower raw material costs. Currently, only two major copper smelters operate in the US, one by Freeport-McMoran in Arizona and the other by Rio Tinto in Utah.
President Trump did mention the possibility of additional tariffs on copper if deemed necessary. Given this sudden policy shift, the expectations are that the US copper market could experience overheating, potentially undercutting LME prices. To add to this, COMEX inventories are reportedly overflowing. The 259,000 tons of short copper held in US exchanges is more than three times the amount stored on the Shanghai Exchange, which is a stark contrast to previous months. The dwindling LME and SHFE inventories may pique the interest of major producers like Chile. Furthermore, hedge funds could find themselves out of their depths in the US copper market; recent position changes indicated a sharp contrast in long positions taken on the London exchange as opposed to a decline in net positions within the US.
