In summary
Aluminium enters the fourth quarter with the firmer fundamental case: exchange stocks are thin, Gulf smelting capacity is still recovering, and the raw-material side is loosening rather than tightening. Zinc is the more two-sided market — spot conditions are exceptionally tight, with exchange stocks near multi-year lows and treatment charges in negative territory, yet most published balances still point to surplus through 2026–27. Our base case: aluminium rangebound with an upward bias, zinc volatile and top-heavy. For buyers, Q4 is a quarter to secure availability in aluminium and to avoid over-committing volume in zinc.
The non-ferrous complex has spent August trading on inventory rather than on demand. Both metals are being priced off what is physically available on warrant this week, not off consumption forecasts for next year — and that makes exchange stocks, not GDP, the variable to watch into the fourth quarter. What follows are the four drivers we are tracking across our Non-Ferrous Metals desk, and what they imply for procurement across the Industrial Products & Commodities sector.
Driver 1 — Aluminium's inventory buffer has worn thin
LME aluminium has been trading around the US$3,280 per tonne area for three-month metal, with the curve close to flat against cash — a structure that signals a market with very little spare metal to lend. Exchange opening stocks were reported at roughly 257,900 tonnes in early August, a modest buffer for a market consuming that much in a matter of days. Analysts tracking the balance describe a supply deficit of around 600,000 tonnes for the year, or roughly 50,000 tonnes a month of unmet demand, with near-term institutional targets clustered near US$3,600 and bull cases toward US$4,000 if constraints persist. Thin warehouse cover is what turns an ordinary supply hiccup into a premium spike — which is why physical premia and delivery windows matter more than the headline LME print for anyone buying billet, ingot or extrusion feedstock this quarter.
Driver 2 — Gulf supply is still rebuilding
The regional picture reinforces that tightness. GCC aluminium output reached a record of about 6.45 million tonnes in 2025, but 2026 has been disrupted: Emirates Global Aluminium has said its Al Taweelah smelter will not return to full capacity until early 2027 following this year's outage, with the associated recycling plant ramping through the end of this year. The Gulf Aluminium Council has also indicated regional producers have no major new smelting expansions planned despite expectations of stronger demand. For buyers in the Gulf, that means less local metal chasing the same construction, packaging and cable demand — and a stronger case for multi-origin cover through our global sourcing network rather than reliance on a single regional supplier.
Driver 3 — Alumina is the loosening side of the chain
Upstream, the raw-material story runs the other way. The LME alumina (Platts) reference stood near US$346 per tonne in early August, up from roughly US$307 in late June, but refinery analysts still describe a persistent — if narrowing — surplus through the balance of 2026 as new Indonesian and Chinese capacity ramps up. A loose alumina market caps smelter cost inflation and, over time, encourages restarts where power is available. It is the main structural argument against runaway aluminium prices, and it is worth watching alongside bauxite logistics and the wider industrial minerals flows that feed the chain.
Driver 4 — Zinc's tight spot market versus a forecast surplus
Zinc is the sharper contradiction in the complex. Prices briefly touched roughly US$3,703 per tonne in early August as inventories drew down, with LME closing stocks reported near 35,300 tonnes — the lowest since March 2023 and less than a day of global consumption. Treatment charges, the fee smelters earn for converting concentrate to metal, have fallen into negative territory, which blunts the incentive to raise refined output even when metal is scarce. Yet the published medium-term balances still point the other way: Fastmarkets and StoneX both describe mine and smelter expansions outpacing tepid demand growth, implying surplus into 2026–27, while several banks flag US$3,200–3,600 as the working range with upside toward US$4,000 only if stocks fall to critical levels. A market that is squeezed at the front and surplus at the back typically produces backwardation, sharp spikes and equally sharp reversals — a poor environment for long-dated fixed-price commitments.
Scenarios into Q4 2026
The table frames base, bull and bear cases for the two metals into the fourth quarter. These are directional planning scenarios for procurement discussion, not price forecasts or trading advice.
| Scenario | Aluminium | Zinc | What triggers it |
|---|---|---|---|
| Base | Rangebound with an upward bias; premia stay firm | Volatile and top-heavy; spot tight, forward soft | LME stocks stay thin, Gulf capacity recovers slowly, alumina surplus caps costs, zinc concentrate stays scarce but refined balances loosen |
| Bull | Tests the upper end of analyst targets on any new outage | Squeezes toward the US$4,000 area | Further smelter disruption or power curtailment; exchange stocks fall to critical levels; restocking in construction and cable demand |
| Bear | Slips as alumina surplus enables restarts | Retreats as forecast surplus materialises | Alumina capacity ramps faster than expected; smelter restarts arrive; treatment charges normalise and refined zinc output accelerates into soft demand |
What this means for buyers
The two metals argue for opposite tactics. In aluminium, availability is the scarce commodity rather than price: secure Q4 allocation early, treat the physical premium and delivery window as part of the negotiation, and diversify origin so a single smelter's problem is not also yours. In zinc, favour shorter tenors and staggered cover over lump-sum forward buying, and resist chasing spikes driven by warehouse stock rather than consumption. In both, landed cost is decided as much by freight, duty and inspection as by the exchange print — see our Supply Chain & Logistics and quality assurance capabilities. Arian Holding's trade desk structures multi-origin non-ferrous supply with certification and delivered-cost transparency — request a quote for firm pricing against your specifications and delivery window.
Sources: Discovery Alert — LME aluminium price & stocks, August 2026; AGBI; AlCircle; Fastmarkets base metals update; StoneX; Alumina price benchmarks (SMM/LME Platts). Figures are indicative market levels and published forecasts around August 21, 2026, provided for general information only — not trading, investment or procurement advice.