J.P. Morgan: China Aluminum Exports Ease Overseas Tightness; Copper Supported by U.S. Tariff Expectations
AI summary card
J.P. Morgan: China Aluminum Exports Ease Overseas Tightness; Copper Supported by U.S. Tariff Expectations
China's exports of semi-finished aluminum are accelerating the digestion of high domestic inventories and alleviating overseas shortages; copper prices are supported by potential U.S. tariffs, though actual end-use demand in China remains weak.
- Arbitrage window for China's semi-finished aluminum exports has opened, accelerating relief of overseas tightness as LME inventories fall to 330k tonnes
- Driven by profits, annualized output at Chinese aluminum smelters reached 45m tonnes, though risks of bauxite supply disruptions from Guinea warrant caution
- U.S. Department of Commerce to update copper tariff review on June 30; expected to maintain or escalate tariffs to retain domestic inventory
- Divergence between China's apparent copper consumption and end-use demand: April apparent consumption rose 9%, but weighted end-use demand indicator fell 4%
- Zinc concentrate imports turned negative and spot TCs fell into negative territory; smelters maintaining high output short-term face raw material bottlenecks
- China's power grid investment grew >30% YoY in Jan-Apr, offsetting the impact of slower new energy installations
Report interpretation
Overview
This edition of J.P. Morgan's Base Metals Supply & Demand Tracker focuses on China's role as a regulator in the global metals balance. The core conclusion is that China's exports of semi-finished and finished aluminum have become a critical 'safety valve' easing overseas market tightness, while the copper market is influenced by the interplay between potential U.S. tariff policies and weak actual end-use demand in China. The report details the latest supply-demand data, trade flows, and price forecasts for copper, aluminum, zinc, and nickel, noting that while apparent data for some metals appears strong, understanding the true tight supply-demand balance requires analyzing inventory changes and export arbitrage.
Core views
Aluminum Market: Exports Act as Hub for Global Rebalancing. The global aluminum market currently exhibits significant domestic-overseas divergence: LME inventories have continued to decline to a low of 330k tonnes, while visible Chinese inventories remain at multi-year highs of approx. 1.4m tonnes. With the arbitrage window for semi-finished aluminum exports from China to other Asian regions open and attractive, robust Chinese exports are accelerating the drawdown of domestic inventories. On the production side, high aluminum prices have incentivized Chinese producers to operate at full capacity; annualized refined aluminum output reached 45m tonnes in April, up 3.4% YoY. However, supply-side risks persist: 75% of China's bauxite imports come from Guinea, and any export disruption there would severely threaten Chinese output and export capacity. Copper Market: Misalignment Between Tariff Expectations and Actual Demand. The U.S. Department of Commerce is scheduled to submit updated recommendations on Section 232 copper tariffs to the President on June 30. J.P. Morgan believes the Trump administration will likely implement tiered tariffs (15% starting 2027, rising to 30% the following year), aiming to retain imported copper within the U.S. as strategic reserves rather than stimulating destocking. This expectation will continue to support tight cathode copper supply in non-U.S. markets. Domestically in China, copper consumption shows a clear divergence: April apparent consumption rose 9% YoY, primarily reflecting restocking and destocking rhythms following a previous 'buyers' strike'; however, the weighted end-use demand indicator, excluding inventory factors, fell 4% YoY, indicating continued weakness in renewable energy installations and white goods production, which cannot be fully offset solely by power grid investment and EV production. Zinc and Nickel: Coexistence of Raw Material Constraints and Weak Demand. The zinc market faces a typical contradiction of 'tight ore, loose ingot': China's zinc concentrate imports fell nearly 10% YoY in April, and spot treatment charges (TCs) turned negative from late March. Although smelters maintained 5% output growth relying on prior inventories, raw material shortages will eventually transmit to refined zinc output. Demand is even weaker, with galvanizing operating rates below the five-year average and social inventories stalled at a high of 264k tonnes. In the nickel market, global visible inventories have increased by 70k tonnes YTD to approx. 470k tonnes. Higher ore benchmark prices in Indonesia may squeeze producer margins and curb refined output; the market is closely watching summer quota adjustments in Indonesia.
Analysis framework
The report employs an analytical framework combining 'cross-regional arbitrage and inventory cycles.' For aluminum and copper, the institution does not view single-country supply-demand in isolation but monitors the opening and closing of import-export arbitrage windows to determine cargo flows, thereby explaining why high Chinese inventories correspond with low overseas inventories. Simultaneously, when assessing Chinese demand, it deliberately distinguishes between 'apparent consumption' (including inventory changes) and 'end-use indicators' to avoid false boom or panic signals caused by supply chain restocking/destocking. Furthermore, regarding policy variables (such as U.S. Section 232 tariffs), scenario analysis is used to evaluate the structural impact of different tariff paths on global physical inventory distribution.
Methodology notes
Cross-border Arbitrage
When the price spread between two regions covers freight and taxes, a positive arbitrage window forms, directing cargo from low-price to high-price regions. This report uses this logic to explain why increased exports can serve as a 'safety valve' easing overseas tightness despite high Chinese aluminum inventories; it is a core leading indicator for judging short-term trade flows.
Apparent Consumption vs. End-Use Demand Decomposition
Apparent Consumption = Production + Net Imports - Inventory Change, which is easily distorted by hoarding or destocking. The report constructs a 'Consumption-Weighted End-Use Indicator,' directly anchored to actual production scheduling data from downstream industries (e.g., power grids, autos, appliances), thereby identifying that the 9% surge in April copper apparent consumption was actually restocking, while true demand declined by 4%.
Inventory Cycle and Buyers' Strike Effect
Refers to short-cycle fluctuations caused by inventory changes. The text notes that China experienced a 'buyers' strike' (active destocking) from Q4 2025 to Q1 2026, causing subsequent restocking behavior to distort current apparent demand data; this is a key perspective for interpreting noise in short-term commodity data.
Key data
- LME Aluminum Inventory330k TonnesContinued decline, reflecting overseas supply tightness
- China Visible Aluminum Inventory~1.4m TonnesAt multi-year highs, accelerating drawdown via exports
- China Refined Aluminum Annualized Output45m TonnesUp 3.4% YoY in April, driven by high margins
- China Copper End-Use Demand Indicator-4% YoYYoY decline in April; cumulative Jan-Apr up only 1.2%
- China Copper Apparent Consumption+9% YoYApril data, driven by restocking, diverging from end-use demand
- China Zinc Concentrate Imports-10% YoYSignificant drop in April; spot TCs turned negative
- Global Visible Nickel Inventory~470k TonnesNet increase of 70k tonnes YTD
- China Power Grid Investment Growth>30% YoYCumulative YoY growth for Jan-Apr 2026
Impact & implications
For the aluminum supply chain, as long as the export arbitrage window remains open, China's high inventories will not suppress prices but will instead serve as a reservoir stabilizing global supply; however, this buffer mechanism could fail rapidly if Guinea's bauxite supply is disrupted. For copper, if the U.S. escalates tariffs as scheduled, it will further entrench the pattern of 'U.S. hoarding, non-U.S. tightness,' benefiting LME copper prices but potentially exacerbating regional premium divergence. For zinc, transmission of tightness from ore to ingot is only a matter of time; once smelters are forced to cut output, current weak demand expectations could be reversed by supply contraction. Overall, pricing power in base metals is shifting from pure aggregate supply-demand dynamics to regional logistics and policy games.
Risks
- Disruption to Guinea bauxite exports could lead to restricted Chinese aluminum output and tighter export policies
- Adjustment magnitude or timeline of U.S. Section 232 copper tariffs falls short of expectations
- Premature large-scale production cuts at Chinese zinc smelters due to raw material exhaustion
- Summer adjustment to Indonesian nickel ore quotas exceeds expectations, impacting refined nickel supply
What to watch
- June 30 update report from U.S. Secretary of Commerce on copper tariffs
- Weekly export volume of China semi-finished aluminum and pace of domestic inventory drawdown
- Guinea bauxite shipment status and China import data
- Trends in China zinc spot treatment charges (TCs) and smelter operating rates
- Progress on new approvals for Indonesian nickel ore quotas