Hindalco plans to move its alumina spot tenders onto Metalshub to build a transaction price

The alumina price that supply contracts reference is a price-agency assessment ^[10]. Platts, part of S&P Global, publishes the assessments that both the LME and CME futures contracts rely on ^[6]. Assessments need trades, and there are few ^[6]. Hindalco estimates that 55-60 million tonnes of alumina are available for trade between independent companies, with about 10% of that sold spot ^[8][9]. That works out to 5.5-6 million tonnes ^[1]. The International Aluminium Institute puts 2025 production of metallurgical alumina at 146 million tonnes, much of it shipped to producers' own smelters ^[7]. On those figures the spot slice is about 4% of world output ^[2]. Contracts far larger than those spot sales then settle against the assessments ^[10].

The sample is thin for a second reason. Participants are often reluctant to disclose deal data ^[11]. Hindalco itself ran its earlier tenders without wide publicity ^[12]. I think moving the input from voluntary reports to recorded deals is the right fix. Hindalco plans to route its tenders through Metalshub, a digital platform, so that prices rest on actual deals, according to mezha.net's account of Reuters reporting ^[1][13].

The report lays out a possible path from tender to hedge ^[16]:

1. Hindalco runs its tenders on Metalshub. 2. The price data passes to LME Insight. 3. The LME builds an alumina index from that data. 4. The index later underpins a futures contract.

The report calls this a potential scenario, not a confirmed decision to launch anything ^[16]. The parts exist. Metalshub already works with the LME on a pricing approach for low-carbon nickel ^[14]. LME Insight is the price arm of a commodity pricing and analytics company that began operating in Dubai late last year ^[15]. That company and the LME are both owned by Hong Kong Exchanges and Clearing ^[17]. Hugo Brodie of the LME said in Hindalco's statement that independent price benchmarks based on real deals would make pricing more transparent and raise overall market efficiency ^[18].

Demand for a standalone alumina price is growing because alumina and aluminium prices increasingly move apart ^[20]. Until about the mid-2010s alumina was priced as a share of the aluminium price. Alcoa pushed to drop that link in favour of prices set by spot deals, which were expected to support futures trading ^[19]. The war with Iran cut Gulf aluminium output by 2 million tonnes year on year. That lifted metal prices, while the lost smelting cut alumina demand in an already weak market ^[21]. China's caps on smelter capacity never covered alumina refining, so refinery output kept rising as metal output growth slowed ^[22]. Indonesia's alumina output is also outrunning what its local smelters need ^[23]. The Shanghai Futures Exchange has the most active alumina futures. Its contract has had speculative spikes, though, and its terms do not suit western companies trying to hedge ^[5].

The weak point is concentration. An index fed by one seller's tenders prices that seller's cargoes. For the number to carry over to a western buyer's hedge, other sellers would have to put volume through the same platform. Tenders would also have to clear often enough that a single cargo does not set the index. The report does not give tender volumes or a schedule. Exchanges have listed alumina before with little to show for it. The LME contract launched in 2019 and has not traded since early 2020 ^[3]. CME's product, available since 2017, sees only occasional deals ^[4]. Both settle on assessments drawn from the same thin spot market ^[6].