Middle East Conflict Disrupts Aluminum Supply; Global Market May See Modest Deficit

Overview

This report analyzes the impact of geopolitical conflict in the Middle East on the global aluminum supply chain and evaluates the combined effect of resulting supply disruptions and weakening demand on the 2026 aluminum market balance. Although supply has been significantly impacted, downward revisions to demand growth expectations mean the market is still projected to experience only a modest deficit. The report also discusses trends in inventories, positioning, and premiums, and provides an outlook on medium- to long-term supply-demand dynamics.

Core views

Significant supply shock: The Middle East is a key global source of primary aluminum, accounting for roughly 9% (~6.6 million tonnes) of global production in 2025, most of which relies on transport through the Strait of Hormuz. Due to conflict-related damage to power infrastructure and raw material shortages, an estimated 3 million tonnes of annualized capacity has been shut down or affected, over 1.6 million tonnes of which was unplanned, with restart timelines potentially exceeding one year. Slowing demand growth: While supply has contracted, global aluminum demand growth for 2026 has been revised down to below 2%, due to weak macroeconomic conditions and high aluminum prices suppressing consumption. Demand weakness is particularly evident in Europe, South Asia, and the U.S., while reduced substitution pressure from copper and increased plastic substitution in packaging further weigh on consumption. Modest market deficit expected: Incorporating adjusted supply and demand forecasts, UBS predicts a global aluminum deficit of approximately 1.8 million tonnes in 2026. Although new capacity additions in regions like Indonesia may ease supply constraints, the market will likely remain in a tight balance until demand shows clear signs of improvement. Divergence in inventories and positioning: Social inventories in China remain high, reflecting weak domestic demand. While LME inventories are low, open interest is near historical highs, indicating complex market sentiment. Additionally, premiums in Europe, the U.S., and Japan continue to rise due to persistent supply disruptions.

Analysis framework

Supply-demand balance analysis: The report first quantifies the specific impact of the Middle East conflict on aluminum supply, including the scale of shutdowns and expected restart timelines. It then adjusts future demand growth expectations based on macroeconomic trends and downstream sector dynamics. Scenario simulation and forecasting: A supply-demand model is constructed to project market balance beyond 2026, incorporating potential impacts from the pace of new capacity ramp-up in regions such as Indonesia and India. Cross-validation using market signals: Multiple market indicators—including exchange inventories, net positioning, and physical premiums—are used to validate supply-demand assessments and evaluate potential short-term price movements. Structural factor considerations: The report emphasizes long-term structural demand support from the energy transition but concludes this is insufficient to offset cyclical macroeconomic headwinds in the near term.

Methodology notes

• Supply-Demand FrameworkSupply-demand framework

  Supply-Demand Balance Analysis

  Quantitative modeling of supply-side factors (e.g., capacity shutdowns due to Middle East conflict) and demand-side drivers (e.g., global economic weakness) to forecast market deficits or surpluses. This is one of the most common analytical approaches in commodity research.

• Cycle and Sentiment FrameworkInventory cycle (Kitchin)

  Inventory Cycle

  The report observes high social inventories in China, suggesting the market may be at the tail end of active restocking or the early stage of passive inventory accumulation—a typical pattern during periods of weak demand.

• Event-Driven and Behavioral FinanceExpectation Gap / Expectation Management

  Market Expectation Management

  Although the Middle East supply shock boosted LME positioning, weak demand has limited price sustainability, illustrating a post-event correction phase where markets reassess initial reactions.

• Industry/ Sector Analysis FrameworkCost curve analysis

  Cost Curve

  The report notes that high LME prices have prompted restarts of higher-cost capacity (e.g., in Europe), reflecting marginal supply adjustments based on the industry cost curve.

• Fixed Income and Credit AnalysisSpread analysis

  Premium Analysis

  The report attributes rising aluminum premiums in Europe, the U.S., and Japan to supply disruptions rather than strong demand, helping distinguish genuine tightness from structural distortions.

Key data

• 2026 Global Aluminum Supply Growth-1%Further revised down from previous forecasts
• 2026 Global Aluminum Demand Growth<2%Below historical average, reflecting economic weakness and price-induced demand destruction
• Projected 2026 Global Aluminum Deficit~1.8mtDriven primarily by Middle East supply shock, with weak demand capping upside
• Annualized Capacity Affected in Middle East~3mtOver 1.6 million tonnes of which was unplanned shutdown
• China Social Inventory Level~1.45mtNear historical highs, reflecting weak demand
• LME Net Long PositioningNear historical highsAs of May 2026

Impact & implications

For aluminum prices, the Middle East supply shock provides short-term support, but weak demand limits upside potential, suggesting prices will likely consolidate around current levels. Over the medium to long term, if supply recovery lags or structural demand improves, the market could shift toward a larger deficit. In China, high inventories suppress domestic price performance, with SHFE trading at a discount to LME. For global trade flows, reduced Middle Eastern supply will increase reliance on alternative sources (e.g., Russia, Africa), potentially sustaining a geopolitical risk premium.

Risks

• Escalation of Middle East tensions could lead to additional capacity shutdowns
• Deeper global economic recession further dampening aluminum demand
• High aluminum prices triggering broader substitution effects
• Delays in commissioning of new capacity in Indonesia and elsewhere
• Escalating sanctions in Europe and the U.S. disrupting global logistics and trade

What to watch

• Evolution of Middle East conflict and progress on capacity restarts
• Chinese aluminum consumption data and inventory drawdown trends
• Trends in aluminum premiums in Europe, the U.S., and Japan, and shifts in import flows
• Commissioning schedules for new projects in Indonesia and other regions
• Global macroeconomic indicators and manufacturing PMI readings