Norsk Hydro's Alunorte plant cut alumina output 50% due to natural gas supply disruptions; aluminum rose nearly 2% to $3,373/tonne in London as LME stockpiles fell to their lowest since 1990.
What moved
Norsk Hydro's Alunorte plant cut alumina output 50% due to natural gas supply disruptions; aluminum rose nearly 2% to $3,373/tonne in London as LME stockpiles fell to their lowest since 1990.
The market transmission
A major alumina refinery offline at half capacity tightens physical aluminum supply into an already tight inventory structure. The 30+ year low in LME stocks amplifies the price impact of the outage. Restoration depends on gas supply normalization with no stated timeline, creating near-term upside bias for the metal. The squeeze is regional to Brazil and Norway's exposure, not systemic, but affects global pricing.
What would change this
The outage is supply-constrained by external input (natural gas availability) rather than equipment failure, so the duration is uncertain and tied to regional gas market conditions. At historic lows in LME inventory, even a 50% cut at one facility has outsized impact. This is not a permanent loss of capacity.
Directional leans
ALUMINIUM ▲ moderate