The US aluminum market has become increasingly disconnected from global benchmarks as tariff policy reshapes trade flows. The Section 232 duties, raised to approximately 50% during 2025, have effectively created a two-tier market: US domestic prices above $5,200/t versus an LME benchmark near $3,700/t. The 68% premium US buyers now pay reflects both the tariff cost and the logistical challenge of sourcing non-tariffed metal.
The tariff impact extends beyond simple price differentials. US primary aluminum imports fell 14% in the first ten months of 2025 versus the prior year, as higher costs suppressed downstream demand. Domestic consumers — from automotive to construction to packaging — are absorbing the full impact of the tariff structure.
In Europe, attention is focused on the potential closure of South32's Mozal smelter in Mozambique, which supplies a significant portion of the Atlantic Basin aluminum market. High power prices and operational challenges threaten the facility's viability, and its closure would remove approximately 300,000 tonnes of annual capacity from a market already struggling with tight supply.
Indonesia's rapid capacity expansion provides a partial offset. The country has added approximately 705,000 tonnes of new primary aluminum capacity, bringing total output to around 1.4 million tonnes. However, much of this metal is consumed domestically or shipped to China, limiting its impact on Western markets.
The cumulative effect of these dynamics is a market characterized by extreme regional divergence. The traditional 'one price' aluminum market has fragmented into distinct US, European, and Asian pricing zones, each with its own supply-demand balance and premium structure.
The regional fragmentation of aluminum markets requires a segmented procurement strategy. US buyers should consider domestic sourcing options and evaluate the cost of versus paying the 68% premium on imported metal. European buyers should monitor Mozal developments closely and consider securing alternative supply sources. Asian buyers benefit from Indonesian supply growth but face competition from Chinese demand.