Aluminum prices on the London Metal Exchange are climbing into the end of the week, reaching $3,621 a ton and approaching the peak seen during Russia's 2022 invasion of Ukraine. The problem now is that the aluminum market has been thrust into a serious supply shock amid the U.S.-Iran conflict in the Middle East, one that is unlikely to be reversed in the near term.

One big problem we highlighted last weekend was that Emirates Global Aluminum (EGA), the Gulf's largest aluminum producer, declared force majeure on part of its contract book after Iranian missile and drone strikes hit its Al Taweelah smelter. Then there is the Hormuz chokepoint and the U.S. blockade of the critical waterway, which has only further throttled vessel traffic.

It is important to note that EGA accounts for 4% of the world's aluminum production. The broader Middle East accounts for about 9% of global aluminum production.

JPMorgan analysts have warned that the industry is descending into a black hole, or a "metaphorical point of no return," where the "global aluminum market will face a serious and prolonged supply outage," even if vessel flows through the Hormuz chokepoint resume in the near term.

The analysts warned clients earlier this week that the market has now entered that dangerous void, and LME prices could soon reach $4,000 a ton as the largest supply deficit in more than 25 years quickly emerges.

Goldman commodity specialist James McGeoch recently warned clients, "Hard to think of a bigger metal supply shock: High degree of expectation this was where it was heading, but the initial reaction was to fade the uncertainty yesterday, that should be replaced by fresh length if history is a guide."

Countries exposed to Gulf aluminum shipments include the U.S., Japan, Turkey, South Korea, Saudi Arabia, the Netherlands, Italy, Greece, and India. Any supply shock could hit Western manufacturers, allowing alternative suppliers in China and Russia to step up.