China's 40,668-Ton Zinc Wave Capped the LME Squeeze — The Real Shortage Has Moved West

The squeeze built in three acts. Between December 2024 and mid-August 2026, LME warehouse stocks collapsed 64% from roughly 264,000 tonnes to 88,000 tonnes. The cash premium over three-month metal exploded to $323/ton in October 2025 — the highest level since at least 1997 — before easing to $215/ton in late August 2026. Three-month LME zinc hit a four-year high of $4,107/ton cash-settled on Aug. 27, 2026, up 55% from a mid-2025 trough near $2,650.

Then China opened the tap. August exports of 40,668 tonnes were the second-largest monthly total in nearly two decades, lifting LME inventory to a four-month high and pulling the three-month price back from $4,065/ton in early September to $3,766/ton on Oct. 6, 2026. Hong Kong took 35,000 tonnes since mid-August, Singapore 21,250 tonnes and Kaohsiung 16,725 tonnes — three LME delivery points absorbing 80% of August outbound shipments.

China became a net refined-zinc exporter of 4,388 tonnes over the first eight months of 2026, on course for its first annual net-export year since 2022. The driver was a textbook arbitrage: the LME backwardation pulled Chinese metal into nearby Asian warehouses faster than customs data — released on a seven-week lag — could capture it. Through August, China ran with refined zinc output up 5.9% YoY while the rest of the world contracted 3.4% YoY in the first half.

The ILZSG swung its 2026 zinc balance by 300,000 tonnes — from a forecast 271,000-tonne surplus to a 29,000-tonne deficit — almost entirely because of Western mine and smelter attrition. Global mine output shrank 2.6% YoY in the first half, and the cumulative decline from 2015 to 2025 has already taken 8.6% out of global production.

Trafigura's footprint made the squeeze worse. In early August 2026, a single short position equivalent to 20–29% of open interest in the LME August zinc contract sat on the books as the cash premium held $60/ton above three-month metal. With Nyrstar's Budel smelter — 315,000-tonne annual capacity — now under formal review and Nyrstar CEO Guido Janssen publicly warning the Dutch plant is \"losing money every year,\" the Western smelting base is the part of the chain that cannot bounce when prices rise.

More than half of global zinc consumption runs through galvanizing — and the AI build-out is the fastest-growing slice. Hot-dip galvanized steel is the standard for power-generation and transmission infrastructure, switchgear enclosures, cable management and data-center structural steel. Nucor now claims 95% of all steel products that go into a data center, with management citing \"a few examples\" of HSS structural tubing, rebar and galvanized product lines built specifically for that customer base. Construction accounts for more than half of global zinc usage, and the data-center construction market is on track for 7.5–8.1% CAGR through 2030.

Equity markets have already priced the squeeze in the miners. Year-to-date through early October 2026, Teck Resources is up roughly 47%, Glencore is up 46%, and Nexa Resources is up 60%. Teck Resources delivered Q2 2026 revenue of CAD 3.61 billion with net income of CAD 854 million, and Q1 2026 revenue of CAD 3.94 billion with net income of CAD 819 million — both quarters well above year-ago levels. Nexa Resources reported Q2 2026 net income of US$98 million on US$899.7 million of revenue, with mining zinc production of 79 kt, up 8% YoY on higher grades.

The squeeze's relief valve sits in three places: China, demand, and Western smelters. First, China. If domestic property or auto demand recovers — China's die-cast zinc-alloy operating rate sits at 38.18% versus prior years above 50% — China will absorb its own metal and stop exporting. Second, demand destruction. China auto sales are already down 22% YoY; global growth softness would accelerate that and kill the squeeze from below. Third, smelter restart economics. Spot TCs need to flip back to positive (above the $85/ton benchmark) before Nyrstar's Budel and similar capacity come back online, and that requires either a concentrate supply response or a smelter rationalization that hasn't started.