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【Commodity Basics】How Aluminum Trading Works: Smelter to End-User

Aluminum trading explained from smelter to end-user. Learn how aluminum is priced on the LME, what premiums drive regional prices, and how cargoes trade.


Aluminum trading involves the physical buying and selling of aluminum in its refined form — Standard High Grade (SHG) aluminum ingot or billet, meeting London Metal Exchange (LME) specifications — as well as aluminum alloys and aluminum scrap. Aluminum is the world's most widely used non-ferrous metal, with applications in transportation, construction, packaging, and electrical products. Physical aluminum trading connects global smelters — where aluminum is produced by electrolytic reduction of alumina — to end-users including automotive manufacturers, aerospace companies, food packaging firms, and electrical cable producers.

Aluminum trading refers to the physical buying, selling, and logistical management of aluminum metal from smelting origins to consuming industries, priced against the LME benchmark plus a regional premium that reflects location, timing, and local market conditions.

How Aluminum Is Priced

Aluminum prices are structured as two components: the LME price and the regional premium. The LME aluminum price — specifically the LME Official Cash Settlement price — is the global benchmark that reflects the worldwide cost of producing aluminum from primary smelting operations. The LME price is set by global supply and demand for aluminum and moves with energy costs (electricity is the dominant production cost in aluminum smelting, typically representing 30-40% of total production cost), alumina feedstock costs, and demand from major consuming industries.

The regional premium is the additional amount buyers pay above the LME price for aluminum delivered to a specific region. Major regional premiums include the Midwest Premium for US domestic aluminum supply, the European duty-unpaid premium for aluminum delivered to Rotterdam, and the Japanese quarterly premium for aluminum delivered to Japanese ports. These premiums reflect regional supply-demand balance, logistics costs from LME-approved warehouses to the consuming region, import duties (where applicable), and the availability of aluminum from specific origins.

For example, if the LME aluminum cash price is $2,350 per metric ton and the Midwest Premium is $0.20 per pound ($440 per metric ton), then aluminum sold for US Midwest delivery costs $2,790 per metric ton. A trader who sources aluminum from a Middle Eastern smelter at LME plus a $200 per metric ton delivered-to-Rotterdam premium and resells it into the US Midwest at LME plus $440 per metric ton captures a $240 per metric ton gross margin, net of freight from Rotterdam to a US Midwest warehouse.

Premiums move independently of the LME price and can be volatile. In early 2022, aluminum premiums surged globally following supply disruptions, creating significant premium-related margin opportunities for traders holding aluminum in regions with widening premiums.

How Physical Aluminum Cargoes Trade

Aluminum cargoes are sold in lots of 25 metric tons (one LME warrant) for small transactions, or in cargo-sized parcels of 500 to 5,000 metric tons for larger deals. Aluminum ingots are typically packed in bundles and shipped in general cargo vessels or bulk carriers. Aluminum billet — a cylindrical semi-fabricated form — is shipped in specialized packaging.

A standard aluminum cathode transaction between a smelter in the Middle East and a German automotive parts manufacturer might be structured as follows. The smelter sells aluminum ingots — Free on Board (FOB) Jebel Ali — at LME Official Cash Settlement averaged over the five business days following the Bill of Lading date, plus an agreed premium for the specific alloy or purity specification. The German buyer pays by Letter of Credit (LC) within 30 days of the BL date. An independent inspector from Bureau Veritas attends loading to certify weight and quality.

Aluminum from different origins trades at different premiums or discounts to the LME regional benchmark. Russian aluminum — historically produced by Rusal, the world's second-largest aluminum producer — has traded at a discount in some markets during periods of sanctions-related uncertainty. Middle Eastern aluminum (from Aluminium Bahrain or Emirates Global Aluminium) is preferred by some buyers for its consistent quality and clean supply chain documentation.

Aluminum trading rewards knowledge of regional premium dynamics, smelter production costs, and the logistics of moving large volumes of metal from production regions to consuming markets — the LME sets the global floor, but the premium is where traders differentiate and generate margin.