The failure of U.S.-Iran negotiations over the weekend, coupled with U.S. President Donald Trump's pledge to blockade the Strait of Hormuz, has injected heightened uncertainty into commodity metal markets already roiled by six weeks of renewed geopolitical conflict in the Middle East. Copper prices fell significantly on Monday, while a key aluminum spread widened sharply and LME aluminum prices hit their highest level in four years, highlighting extreme tightness in spot aluminum supply following large-scale reductions in Middle Eastern production capacity.
The breakdown of the latest geopolitical talks between U.S. and Iranian representatives in Pakistan, and Trump's subsequent commitment to impose a naval blockade on the critical maritime chokepoint—threatening to seal the Strait of Hormuz at 10 a.m. ET on Monday—rapidly dismantled the brief optimism for a ceasefire that emerged last week.
Surging energy prices, which could push global central banks toward more hawkish monetary policy and consequently burden the global economy, pose a significant risk of weakening demand expectations for industrial metals broadly. Aluminum, however, is an exception—its price is rising due to tight spot supply caused by substantial cuts to Middle Eastern production capacity resulting from the regional conflict.
Following the failure to reach a U.S.-Iran peace agreement and the temporary halt in talks, investors are now focused on the prospect that persistently high traditional energy costs could exacerbate already elevated price pressures, thoroughly crushing expectations for Federal Reserve interest rate cuts. The increasingly fragile ceasefire expectations among the U.S., Israel, and Iran are prompting global stock and bond traders to refocus on inflation, significantly reinforcing hawkish expectations that interest rates will remain elevated for longer.
Prolonged high energy costs will substantially increase global price pressures that were already elevated before the Iran conflict, leading markets to reduce Fed rate-cut expectations due to rising inflation and even "stagflation" fears. Some are beginning to price in the possibility that the Fed and other global central banks could return to interest rate hikes, a primary concern for investors and professional traders in equity and bond assets.
Price movements on the London Metal Exchange reflected this dynamic: during Monday's early session, LME copper fell by as much as 1.3%, while LME aluminum rose by up to 1%.
The divergent logic behind copper and aluminum price trends—macro expectations versus supply shock—is most evident in the widening spot premium for aluminum. The spread between the spot contract and the benchmark three-month futures contract for aluminum, a core global industrial metal, jumped 37% from Friday to $91.50 per ton, reaching its highest level since 2007. This indicates rising demand for immediate delivery as buyers seek alternative sources of the metal.
Emirates Global Aluminium PJSC (EGA), the Middle East's largest aluminum producer, has declared force majeure on at least some deliveries after halting production at one of its smelters following an Iranian missile attack. Data shows the Middle East accounts for nearly 10% of global aluminum production.
Shortly before Trump's latest statement, the U.S. military announced it would impose a blockade on all maritime traffic to and from Iranian ports starting at 10 a.m. ET on Monday, adding that vessels not calling at ports of the Islamic Republic could still transit the Strait of Hormuz. The blockade will be enforced against ships of all nations entering or leaving Iranian ports and coastal areas, including all Iranian ports in the Arabian Gulf and Gulf of Oman.
In the short to medium term of this Middle East conflict, copper prices are primarily driven by macroeconomic expectations, market risk sentiment, and global real demand, while aluminum prices are driven by Middle East supply expectations and global logistics bottlenecks.
Copper is more reflective of trading global macroeconomic growth expectations and risk appetite: when ceasefire hopes rise, markets initially bet on falling oil prices, easing stagflation risks, and recovering manufacturing demand, which previously drove copper to a three-week high during a temporary lull in Hormuz tensions. However, when U.S.-Iran talks fail, the U.S. proposes a Hormuz blockade, and oil prices surge again, markets quickly shift to worrying that higher energy costs will burden the global economy, causing copper prices to retreat.
The logic is clear: although copper is supported long-term by the AI data center construction boom and a new grid investment cycle, it remains highly pro-cyclical in the short term, extremely sensitive to changes in global manufacturing, financing conditions, and demand from major consumers like China, Japan, and South Korea.
Aluminum, by contrast, is more influenced by supply shocks and sharp energy cost impacts. In this Middle East geopolitical conflict, the direct hits have been to Middle Eastern smelting and logistics chains. The region accounts for about 10% of global primary aluminum production, and aluminum smelting is itself extremely electricity-intensive. Therefore, risks of a Hormuz blockade, shipping disruptions, smelter attacks, and force majeure declarations immediately amplify market fears of a "spot supply breakdown."
Furthermore, aluminum has long been considered a substitute for copper, particularly in cost- and weight-sensitive applications with less stringent conductivity requirements—a trend ongoing for over a decade and accelerating recently due to resource security concerns and the new energy industry. However, copper remains irreplaceable in high-reliability, high-power applications.
With LME aluminum prices nearing their highest level in four years, the forward curve shifting into backwardation, and option-implied volatility and European spot premiums surging in tandem, the market is no longer treating this shock as temporary noise but is instead pricing in an expanding supply deficit and worsening spot tightness.
J.P. Morgan has consequently labeled the current situation a "supply-driven event horizon." The bank's analyst team believes that if Middle Eastern production halts spread, LME aluminum prices have the potential to rapidly approach $4,000 per ton.
The danger on the supply side, according to J.P. Morgan, is that production cuts have evolved from isolated incidents into a chain reaction. Qatalum has initiated a controlled shutdown, with shareholder Hydro estimating a full restart could take 6 to 12 months; Alba in Bahrain has declared force majeure on some contracts; and EGA has confirmed shipping and dispatch delays. More critically, most Middle Eastern smelters hold only 20 to 30 days of alumina inventory, and shutting down an aluminum smelter itself takes weeks, meaning more reduction or even closure announcements are likely in the coming weeks.
Given the high dependence of Middle Eastern aluminum smelting on imported alumina, and the Strait of Hormuz being a choke-point for both raw material imports and finished product exports, if shipping bottlenecks persist, the market will face not short-term delivery delays but production losses lasting months and significantly higher restart costs.
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