Alumina prices averaged USD 339 per metric ton in September, down 8.5% from August. On 30 September, the commodity traded at USD 321 per metric ton, down 11.6% from 29 August.
In September, alumina average prices fell for the first time in five months, hitting a 21-month low. The decline was due to high port inventories of bauxite—the raw material of alumina—and resumed production in northern China. As a result, the alumina market remained in ample surplus.
This chart displays Alumina (US$/mt) from 2023 to 2025.
Alumina COMEX (prices in US$/mt, aop)
| Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alumina COMEX | - | - | - | 334 | 366 | 427 | 504 | 695 | 534 | 355 | 358 | - |