LME Aluminium's 9% Slide Is a Sentiment Story, Not a Supply Story

By Siam Sukkhee Trading Co., Ltd — 2026-06-27 — LME metals market analysis

Aluminium prices retreated sharply from a four-year high, but the physical market tells a different story: inventories are near historic lows and a key European producer is still running force majeure.

I watched LME aluminium cash prices hit $3,795.50 per tonne on June 1, 2026. Four-year high. Three weeks later, they'd dropped roughly nine percent to around $3,398 per tonne.

One trigger. A US-Iran framework agreement on June 17, complete with a 60-day sanctions waiver and a reopened Strait of Hormuz for Persian Gulf metal exports. Traders repriced the forward supply narrative overnight.

Here's what bothers me: the speed of that repricing.

This correction is running on expectation, not on metal that has actually shown up anywhere. Not on a single tonne sitting in a warehouse or on a ship that's left port.

The LME warehouse inventories are clearer. Since February, registered stocks have fallen more than 31 percent. We're talking roughly 491,000 tonnes down to around 322,000 tonnes. Well below the historical norm of 800,000 to 1,200,000 tonnes. Near 20-year lows, as far as I can tell from LME Insight data.

Russian-origin metal accounts for approximately 92 percent of what's left on warrant. Western buyers have self-sanctioned themselves right out of those stocks, leaving them concentrated in exchange warehouses. The headline inventory number starts to look less reassuring once you factor in who actually wants to buy what's sitting there.

Then there's Emirates Global Aluminium holding force majeure on European billet contracts. Production restart pushed to September. That is not the profile of a market flooded with new supply.

The Iran deal changes the direction of travel, sure. But the physical tightness hasn't resolved. Sixty days of sanctions relief doesn't rebuild smelter capacity or restart curtailed production lines on the same timeline that futures traders reprice risk.

Why the Bears Have a Case Too

The bears aren't working from nothing. China's smelter output has been running close to its self-imposed 45 million tonne annual capacity cap. 2025 production reached approximately 44 million tonnes. Almost no room for growth, or really, for anything.

Indonesian output has been rising. Weaker Chinese economic data in June added pressure to the demand side. S&P Global's energy and metals desk noted in mid-June that while the Iran deal had knocked aluminium lower, supply normalization would take time.

A caveat that hasn't fully registered in how fast prices moved.

The structural picture underneath this correction—or maybe I should say, the structural picture underneath the entire market right now—is one of underlying deficit. China dominates roughly 60 percent of global smelter output and is effectively at its ceiling. The energy-intensive nature of aluminium smelting means that new capacity anywhere takes years to build and commission.

Electrification demand isn't stepping back either. EV battery casings. Grid infrastructure. ING's commodities team had already flagged a supply deficit supporting prices through 2026 before the June volatility hit.

What we're watching is a market caught between two legitimate readings of the same data. The Iran deal is real. The sanctions waiver is real. The prospect of additional Gulf supply coming back online is real. But so is the fact that LME stocks are near historic lows, a key European supplier is offline until September, and Chinese production has essentially maxed out its regulatory headroom.

Neither side is inventing its thesis.

The nine percent pullback from the June 1 peak looks more like a sentiment correction than a fundamental re-rating. If Iranian supply returns slowly, and the physical market stays as tight as inventories suggest, the floor on aluminium prices is probably firmer than the mid-June slide implies.

That's the gap between the narrative that moved prices and the physical reality that hasn't caught up yet.

Tags: LME aluminium, Emirates Global Aluminium, Iran sanctions deal, LME aluminium price June 2026, aluminium warehouse inventory 2026, aluminium supply deficit outlook