Aluminium premium for US buyers soars after Trump doubles tariffs

U.S. Midwest aluminium premiums surged 54% on Monday to $0.58 per lb, or $1,279 a metric ton, following President Trump's announcement of a potential increase in aluminium import tariffs to 50%. Goldman Sachs estimates the premium would need to rise further, to $0.68-$0.70 per lb, to fully reflect the tariff, while Morgan Stanley suggests the higher premium could dampen U.S. spot market purchases as consumers await potential reversals or exemptions.

Analysis

The U.S. aluminium market faces significant disruption following President Trump's announcement of planned tariff increases on imports to 50% from 25%, effective June 4. This has led to an immediate surge in the U.S. Midwest duty-paid aluminium premium, which jumped 54% from Friday to $0.58 per pound ($1,279 per metric ton) on Monday, June 2nd, marking a 164% increase since the start of 2025; this move was partly amplified by it being the first trading day of the month. Goldman Sachs projects that the premium may need to climb further, to between $0.68 and $0.70 per pound, to fully incorporate the 50% tariff. While the LME benchmark aluminium price saw a modest increase of 0.4% to $2,453.5 a ton, the primary impact is concentrated on U.S. physical delivery premiums. The U.S. is heavily dependent on imports, sourcing approximately half of its aluminium for transport, packaging, and construction from abroad, with Canada being the largest supplier (2.7 million tons of unwrought aluminium imported last year). Morgan Stanley has cautioned that these elevated premiums could dampen U.S. spot market purchases as consumers may adopt a wait-and-see approach for potential policy reversals or exemptions. The situation is underscored by the fact that no new primary aluminium smelter has been built in the U.S. for 45 years due to factors like energy costs. Although Emirates Global Aluminium announced in May a $4 billion investment for a new U.S. plant with an annual capacity of 600,000 metric tons, first metal is not expected until the end of the decade. The existing 25% tariffs, implemented in March, had already caused shifts in global trade, including diverting aluminium to Europe—resulting in a 45% fall in European premiums since the start of 2025—and increasing aluminium scrap outflows from the EU to the U.S.

Key Decisions for Investors

• Investors should anticipate significant input cost inflation for U.S. companies reliant on aluminium, particularly in transport, packaging, and construction sectors, and critically assess their margin resilience and ability to pass on costs.
• Closely monitor the U.S. Midwest aluminium premium for continued volatility and potential further increases towards the Goldman Sachs-projected $0.68-$0.70/lb level, while also tracking U.S. spot market purchasing behaviour for signs of demand response or policy shifts.
• Evaluate potential impacts on global aluminium trade flows, including sustained pressure on European premiums and opportunities for non-U.S. producers, recognizing that new U.S. domestic capacity, such as the planned Emirates Global Aluminium plant, represents a long-term rather than immediate supply solution.
• Given the 'strongly negative' sentiment associated with this development and the direct impact of tariff-driven cost hikes, consider the broader inflationary implications for the U.S. economy and advise portfolio companies to review sourcing strategies and hedging mechanisms for aluminium exposure.