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Andy Home: The squeeze on zinc at the LME and ROI signals a deepening of supply risks in the West

Andy Home: The squeeze on zinc at the LME and ROI signals a deepening of supply risks in the West
Andy Home: The squeeze on zinc at the LME and ROI signals a deepening of supply risks in the West

A record low smelter treatment term, a year of underperformance by mines and a scramble to get metal at the London Metal Exchange. If you think this is the description of the copper markets, then think again.

Zinc is under pressure now, even though copper may face a structural shortage in the future.

LME zinc for three months hit a four-year-high of $3,990 per ton on Monday.

LME stocks have remained low throughout the year. The registered inventory is 100,525?tons but nearly a third are in the form?cancelled warrants? awaiting physical loading-out.

The time-spreads will be emphasized in a similar manner. Cash premiums over metals for three months Last week, flexed to more than $230 per ton. The situation has eased slightly, but $139 per tonne still indicates acute shortages.

This was not what I expected.

The global mining output also dropped sharply in the first half this year.

Zinc's unexpected rally is being driven by a shortage of raw materials. If this trend continues, it could turn into a structural problem for Western buyers.

SHORT-LIVED RECONSTRUCTION

Last year, the world's mines of zinc increased their output by 4,8%. This ended a three-year trend of declining production.

The International Lead and Zinc Study Group, which met in April, expected that some of this momentum would carry over into the current year, albeit with a 0.3% slower growth rate.

According to the Group's most recent assessment, the reality is that production declined by 2.6% on an annual basis in the first half 2026.

As they progress through the lower-grade ore bodies, big mines such as?Antamina? in Peru and Red Dog? in Alaska have seen their output fall.

Other people have been hit by unexpected events. After seismic events in September of 2025, the 29Metals Golden Grove mine and Boliden Garpenberg mine both in Sweden and Australia have had to alter their mine plans.

The increase in output last year is now starting to appear as a small blip within a larger downtrend.

According to ILZSG, global mine production dropped by 8.6% from 2015 to 2025. Smelter production, on the other hand, remained essentially unchanged during this period.

The mismatch in mine output and smelter capacities is increasing again, leading to intense competition between smelters for concentrates.

Profit Explosions

Smelters are charging more for the conversion of concentrates to refined metal.

Shanghai Metals Market (SMM)'s assessment of spot prices for imports of zinc concentrate Last month, the price per ton fell to minus $113. This is a new low.

Silver and sulphuric acids are used by smelters to compensate for the loss of revenue that should have been their main source.

Some lucky ones will have been able to secure annual supplies for this year's benchmark price of $85 per tonne. This is still a low number compared to historical standards, and may even fall further if spot markets don't improve by next year's contract negotiations.

Although Chinese smelters struggle with margin compression, they still perform better than their Western competitors.

Imports of Chinese zinc concentrate grew by 30% annually in 2025, as smelters stocked up on the?concentrates' market.

Imports increased again by 5% during the first seven-month period of 2026. This suggests that China has taken a greater share of available volume in a tight market.

According to ILZSG, China's national production of refined zinc increased by 5.9% in the first half 2026. The rest of the world's production?decreased by 3.4%.

STRUCTURAL TIGHTNESS

Western smelters also have suffered unexpected blows, such as a fire in Kazakhstan's biggest zinc facility.

Margin compression caused by low processing fees can be a challenge for a company, especially if they are accompanied by high power costs.

The Australian government already provided financial assistance to Trafigura’s Hobart Zinc Smelter in Tasmania.

The company can now progress with studies to modernise the facility and look at potential co-products like germanium?and indium.

Richard Holtum, Trafigura CEO, stated in a blog post from May about the dire state of European smelters that "markets will not be able to solve this".

The West's zinc-smelting problem will be exacerbated by the current market dynamics of limited concentrate availability and bombed out treatment terms.

The LME squeeze is a reflection of the divergent fortunes between Western and Chinese smelters. London is running out of refined zinc. China has plenty of metal but at the moment is only drip-feeding it into LME storage warehouses. This will ease but not eliminate the shortage.

This could be an 'ahead of time' sign, as the West becomes increasingly dependent on China in order to balance its structural deficit.

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(source: Reuters)