Aluminum Supply Chokepoint Sparks 4-Year High—UBS Warns of $4,000 Ceiling if Strait of Hormuz Stays Closed

The immediate catalyst was clear. When the Middle East conflict erupted on February 28, it sent a shockwave through commodity markets. 3-month LME aluminum futures initially jumped by as much as 10% in the first days, with prices ultimately settling around 8% higher. The metal's climb has been relentless, hitting a 4-year high last week. This surge is not a random spike but a direct consequence of a critical supply chokepoint: the effective closure of the Strait of Hormuz. As a vital shipping lane for Middle Eastern aluminum production, its disruption has caused significant logistical and output problems, with major smelters like Bahrain's Alba cutting production by nearly 20%.

This event forces a confrontation between two powerful forces. On one side is the supply-driven inflation pressure from the conflict. On the other is the demand-driven weakness that often follows geopolitical escalation. The mechanism is straightforward: escalating attacks on energy infrastructure increase the risk of a higher-for-longer energy price scenario, which UBS analysts warn could trigger a broader economic slowdown. In other words, the same conflict that disrupts aluminum supply also threatens to crush the global growth that drives demand for all industrial metals.

The direction of prices over the coming quarters will hinge on which force wins this tug-of-war. The initial 10% spike shows the power of a supply shock. Yet, the longer-term trajectory is dictated by the macro cycle. This cycle is defined by the interplay of real interest rates, the strength of the U.S. dollar, and the underlying trend in global growth. If the conflict leads to sustained higher energy prices and tighter financial conditions, it could tip the balance toward demand destruction. Conversely, if supply disruptions prove prolonged and severe, they could fuel persistent inflation, keeping real rates elevated and the dollar strong-a scenario that often supports commodity prices over the long term.

For now, the market is caught in this tension. Aluminum stands out as the most exposed to the immediate supply risk, but even its rally is being tempered by weak global demand, as one analyst noted. The broader industrial metals complex, according to UBS, remains vulnerable to the downside risks of a prolonged conflict. The bottom line is that while the geopolitical shock has jolted prices, the macro backdrop will determine whether this is a temporary spike or the start of a new phase in the commodity cycle.

Divergence in the Cycle: Supply Shocks vs. Demand Fears

The same Middle East conflict is creating a stark divergence across the commodity complex. For aluminum, the supply shock is overwhelming. The effective closure of the Strait of Hormuz has directly disrupted shipments from major producers like Bahrain's Alba, which has cut output by nearly 20%. This physical disruption has pushed prices to a 4-year high, with analysts warning that further escalation could drive them toward $4,000 per ton. The mechanism is clear: a critical chokepoint for a globally traded metal has been severed, and with inventories tight, the price response is immediate and powerful.

For most other industrial metals, however, the dominant force is the looming threat of demand destruction. UBS analysts note that escalating attacks on energy infrastructure increase the risk of a higher-for-longer energy price scenario, which could trigger a broader economic slowdown. This fear is now the primary pressure on the market. Copper, for instance, has recently traded in a narrow range, with a 0.3% drop on Thursday as demand worries offset any supply concerns. The bank's analysis shows that most industrial metals (aside from aluminium and thermal coal) remain vulnerable in the near term to this downside risk, as the market has yet to fully price in the potential economic fallout.

This tension is playing out in real-time price action. While aluminum gained on a recent session, other key metals like copper and steel sold off heavily. The divergence highlights the core trade-off in the current cycle: a supply-driven inflation shock versus a demand-driven recession risk. Aluminum's price is being tested by the supply side, while copper's stagnation reflects the market's growing conviction that higher energy costs will eventually crush industrial consumption. The bottom line is that the cycle is not uniform. For now, the supply shock is winning for one specific metal, but the broader macro cycle of higher energy prices and potential growth weakness is setting a ceiling on the rally for the rest.

The Broader Commodity Cycle: Gold, Oil, and the Safe-Haven Trade

The shock to aluminum is just one piece of a much larger commodity story. Across the board, prices have extended their gains on the Iran conflict, with the UBS CMCI total returns index up close to 15% year to date. This rally is driven by a powerful combination of geopolitical risk and supportive fundamentals, creating a clear divergence between different asset classes.

The most direct beneficiaries have been the traditional safe-haven and energy assets. Brent crude oil has surged from around USD 72/bbl ahead of the strikes to trade at USD 103.5/bbl as of mid-March. The mechanism is straightforward: the conflict has added a significant geopolitical risk premium to energy prices, while visible supply disruptions have started to materialize. UBS has responded by raising its end-June forecast for Brent to USD 90/bbl, citing the assumption that flows through the Strait of Hormuz will resume by late March or early April. For now, the risk premium is outweighing any near-term demand concerns.

Gold, meanwhile, is positioned for even more room to climb. It has risen to near record highs as a haven for investors, and UBS projects it could rise as high as USD 6,200/oz by mid-year. This outlook is supported by a confluence of factors: persistent central bank demand, the potential for lower real U.S. interest rates, and the ongoing geopolitical tensions. In this setup, gold acts as a pure macro hedge, its price rising as uncertainty grows and the dollar's appeal wanes.

This creates a stark contrast with the industrial metals complex. While aluminum is being lifted by a severe supply shock, other key metals like copper are being pressured by the fear of a broader economic slowdown. The market is effectively pricing two different stories: one of physical disruption for specific commodities, and another of macroeconomic risk for the entire cycle. The bottom line is that the current commodity cycle is defined by this tension. Safe-haven assets like gold and oil are rallying on supply and risk factors, while the path for industrial metals remains clouded by the demand destruction that could follow a prolonged conflict.

Catalysts and the Path to De-escalation

The immediate path for commodity prices hinges on a few critical near-term events. The market is watching for two key developments to determine whether the supply shock or the demand shock dominates. First, it is assessing the durability of recent de-escalation statements. Prime Minister Benjamin Netanyahu's declaration that Israeli forces would no longer target energy infrastructure provided temporary relief, helping to stabilize the market after a sharp sell-off. Yet, this calm was quickly interrupted by a report that the U.S. is considering a high-risk move to take over or blockade Iran's Kharg Island, the nation's key oil-export site. Such a step would be a major escalation, directly threatening to further disrupt flows and reignite the supply shock.

Second, the market is scrutinizing whether alternative shipping routes can provide sustained relief. The recent one-week low for aluminum, as noted, was a direct result of news that alternative Gulf shipping routes are beginning to provide some relief. This shows that the price is highly sensitive to the perceived availability of workarounds. If these routes can effectively reroute a significant portion of the disrupted trade, they will act as a powerful brake on prices by alleviating the immediate supply crunch. The mechanism is clear: alternative flows reduce the scarcity premium, allowing prices to retreat from their peaks.

The bottom line is that temporary relief is possible through de-escalation and rerouting, but the longer-term price ranges depend on the underlying reality of supply. For aluminum, the key watchpoint is whether the Strait of Hormuz remains closed for an extended period. If it does, the physical disruption will persist, supporting prices at elevated levels. If it reopens quickly, the rally will likely reverse. For the broader industrial complex, the path is even more constrained. The market has already priced in a significant risk of demand destruction from higher energy costs. Any further escalation that threatens to deepen that economic slowdown will cap rallies, while a sustained de-escalation could allow prices to retrace toward more cyclical levels. The cycle's next phase will be defined by which of these two forces-prolonged supply disruption or a held-back demand shock-proves more enduring.