Forget Just Nvidia. The Hidden Metals Trade Underneath the AI Supercycle
I have been digging through the physical supply chain behind AI infrastructure, and I think the market is still missing one of the most obvious second-order trades in front of us. Everyone wants to talk about Nvidia, GPUs, hyperscalers, model training, inference demand, power contracts, and data center capex. That is all real. That is all important. But there is a deeper layer underneath the AI boom that does not get nearly enough attention: metals.
AI may look digital when you use it, but the actual infrastructure is brutally physical. Data centers are not built out of vibes. They are built out of copper cables, transformers, switchgear, busbars, cooling equipment, server racks, power electronics, batteries, magnets, chips, interconnects, and refining supply chains. The more I look at it, the more I think AI is not just a semiconductor trade or a power trade. It is becoming a critical minerals trade.
The biggest one is copper. That is the metal I keep coming back to because it is everywhere in the AI stack. A single 100 MW hyperscale data center can require roughly 27 to 47 tonnes of copper per megawatt. That means one facility can consume about 2,700 to 4,700 tonnes of copper before even counting the grid upgrades around it. Once you include substations, transmission lines, transformers, and the surrounding power infrastructure, the copper intensity gets even more serious.
This is not optional copper. It goes into the things that make the building function: power cables, busbars, electrical connectors, transformers, switchgear, grounding systems, heat exchangers, substations, and cooling infrastructure. Copper can account for up to 6% of data center capital expenditure. That may not sound huge at first, but when hyperscalers are talking about hundreds of billions in AI infrastructure spending, even low single-digit percentages become very large numbers.
Global copper demand was around 28 million tonnes in 2025 and is projected to reach 42 million tonnes by 2040. That is a 50% increase. AI data centers alone are expected to consume an average of 400,000 tonnes of copper per year over the next decade, with demand peaking around 572,000 tonnes in 2028. Longer term, data centers could consume as much as 3 million tonnes of copper per year by 2050, taking their share of global copper demand from about 1% today to as much as 7%.
That would be manageable if supply could respond quickly. It cannot. Copper is not software. You cannot just raise capex guidance and ship a new mine next quarter. New copper mines take roughly 17 years from discovery to first production. Chilean ore grades have fallen about 40% since 1991. Exchange warehouse inventories were only around 661,021 tonnes as of late 2025, which is not much cushion when you look at the scale of projected demand.
The market is already tight. Estimates for the 2025 refined copper deficit range from 124,000 tonnes to 304,000 tonnes. Longer term, the IEA projects a possible 30% copper supply deficit by 2035, equal to roughly 6 million tonnes annually. S&P Global is even more aggressive, projecting a potential 10 million tonne shortfall by 2040. Copper prices already touched about $11,952 per tonne in December 2025, up roughly 35% year-to-date, and BloombergNEF has forecast a possible peak around $13,500 per tonne in 2028.
That is why I think copper is the cleanest AI metals trade. AI is not the only demand driver, but that is exactly the problem. AI is showing up at the same time as EVs, renewable energy, transmission upgrades, defense reshoring, industrial electrification, and grid modernization. Too many megatrends are leaning on the same metal at once, and supply does not have a fast response mechanism.
Silver is the next one that looks more important than people realize. Most investors still think about silver as a precious metal first, but the industrial side of the market is becoming the real story. Silver is the most electrically conductive metal, which makes it useful in switchgear, circuit breakers, silver-plated copper connectors, busbars, thermal interface materials, heat exchangers, electronics, and power systems.
Then there is the solar angle. Data centers are power-hungry, and the more hyperscalers lean on solar-backed energy contracts, the more silver comes into the story. Each solar panel contains around 20 grams of silver. A 500 MW solar array for a hyperscale facility can require roughly 300 tonnes of silver. That is not a rounding error when the silver market is already in structural deficit.
Total silver demand reached 1.16 billion ounces in 2024. Industrial fabrication hit a record 680.5 million ounces, representing 59% of total silver consumption. A decade ago, industrial demand was closer to 50% of the market. Electrical and electronics demand alone consumed 460.5 million ounces in 2024, while solar photovoltaic demand added another 197.6 million ounces.
The silver market has been in deficit since 2021. The 2024 deficit was 148.9 million ounces, or about 4,630 tonnes. The projected 2025 deficit is 117.6 million ounces, which would make it the fifth consecutive year of shortfall. Cumulative deficits from 2021 through 2025 total nearly 800 million ounces, or around 25,000 tonnes.
The supply side is awkward because about 70% of silver is produced as a byproduct of copper, lead, and zinc mining. That means silver supply does not respond cleanly to price. If silver rips higher, miners cannot simply flip a switch and flood the market with new primary silver production. Mine production in 2024 was 819.7 million ounces, up only 0.9%, even as industrial demand stayed strong. Meanwhile, COMEX silver inventories reportedly fell from around 150 million ounces to roughly 46 million ounces, and LBMA vaults held about 325 million ounces of available metal. Silver traded above $80 per ounce in January 2026, up roughly 170% year-over-year.
Gold is a different type of issue. I do not think gold is the bottleneck that stops AI infrastructure from being built, but it does add cost pressure to the hardware stack. AI processors use about 2 to 3 times more gold per unit than traditional processors because advanced packaging requires better signal integrity and reliability. Gold shows up in high-frequency interconnects, bonding wire, via metallization, trace plating, die attach materials, and advanced semiconductor packaging.
Electronics-sector gold consumption reached about 270.4 tonnes in 2025, roughly flat versus 2024. Total technology and industrial gold demand was around 222.8 tonnes in 2025. East Asia accounts for about 68% of electronics gold demand because the semiconductor supply chain is concentrated in China, Taiwan, and South Korea. Gold is not scarce in the same way copper or silver is scarce, since total global gold demand was above 5,000 tonnes in 2025, mostly from investment and jewelry. But higher gold prices still matter because they pressure component manufacturers and push more R&D into thrifting and substitution.
Zinc is not the main event, but it matters indirectly. Zinc is used for corrosion protection in steel structures, which matters for data center construction. More importantly, zinc ores are a major source of germanium, and germanium is relevant to fiber optics and high-speed transistors. Global refined zinc demand rose 1.9% in 2025 to 13.86 million tonnes. The zinc market posted a 33,000 tonne deficit in 2025, down from a 69,000 tonne deficit in 2024. Mine production increased 5.4%, and reported inventories fell by 77,000 tonnes to about 739,000 tonnes by year-end.
But zinc itself does not look like the AI bottleneck. The market is projected to swing into a 271,000 tonne surplus in 2026 as smelting capacity expands and demand growth slows. The real AI-linked issue is germanium, because China dominates germanium refining. That is where the supply chain gets uncomfortable.
Gallium may be the most important small metal in the whole AI stack. This is where the conversation shifts from volume bottlenecks to chokepoint bottlenecks. Gallium is critical for gallium nitride, or GaN. GaN power devices are used in high-efficiency AI data center power systems because they enable higher power density, lower energy waste, and efficient 48V DC-DC conversion.
This matters because AI servers are power-hungry and heat-heavy. GaN devices are about 5 times more conductive than silicon. GaN power ICs can reach power densities above 137 W/in³ with efficiencies above 97%. Without GaN, AI servers need larger power supplies, waste more energy, and generate more heat. That makes gallium a small metal with a very large role.
The power GaN device market is projected to grow from $126 million in 2021 to $2 billion by 2027, a 59% CAGR. The IEA projects that data center buildout could boost global gallium demand by up to 11% by 2030. But demand is not the scary part. Supply is.
China controls about 98% of global gallium production. Gallium is mostly produced as a byproduct of aluminum smelting, so it is not easy to rapidly scale as a standalone market. After China imposed export restrictions, gallium prices outside China reportedly doubled within five months. USGS analysis suggests that a 30% disruption in gallium supply could reduce US economic output by about $600 billion, equal to more than 2% of GDP.
That is what a real chokepoint looks like. You do not need massive tonnage to create a massive problem. You just need an input that is hard to substitute, essential to a high-value supply chain, and controlled by one geopolitical rival.
Rare earths are the other major chokepoint. Neodymium and dysprosium are used in high-performance permanent magnets for data center hard disk drives and cooling system motors. Hard drives can contain roughly 15 to 20 grams of neodymium per drive. Cerium oxide is used in chemical mechanical polishing of semiconductor wafers at advanced nodes, including 5nm and below, and it consumes about 40% to 50% of global cerium production. Lanthanum and erbium are used in optical fiber amplifiers for high-speed data transmission between data centers.
The IEA projects that data center buildout could increase rare earth demand by about 3% by 2030. That does not sound huge, but rare earths are not mainly a tonnage story. They are a processing story. China produces around 60% to 70% of global rare earth oxides and controls about 85% of heavy rare earth separation and purification capacity.
The US does produce rare earths, but that does not solve the problem if the refining still happens elsewhere. MP Materials’ Mountain Pass mine produced about 45,000 tons, but roughly 80% was exported to China for refining because domestic processing capacity remains limited. MP’s Texas magnet facility is projected to produce about 1,000 tonnes of NdFeB magnets annually by 2027. China produced around 300,000 tonnes in 2024. That is the gap.
This is the part of the AI story that I think is badly under-discussed. The US can subsidize fabs. It can support data center construction. It can sign massive power contracts. It can talk about reshoring advanced manufacturing. But if the upstream minerals, refining, separation, and processing chains are still concentrated abroad, then the bottleneck does not disappear. It just moves upstream.
Aluminum, lithium, nickel, and cobalt matter too, but they are not the same kind of immediate AI constraint. Aluminum is used in server racks, cooling units, radiators, HVAC systems, and structural panels. AI data centers are expected to need about 800,000 tonnes of aluminum by 2030, but that is just over 1% of current global production in a roughly 75 million tonne market. So aluminum demand is real, but it looks manageable.
Lithium, nickel, and cobalt enter the AI story through backup power. Data centers need lithium-ion batteries for UPS systems and grid stabilization. The data center lithium-ion battery market is projected to reach $17.69 billion by 2034. In 2024, the chemistry split was roughly 41.2% LFP, 28.4% NMC, 12.5% LTO, 10.3% LCO, and 7.6% other. LFP dominates because it is safer and thermally stable, while NMC is used where higher energy density matters. But data centers are still a smaller driver than EVs. The bigger issue is concentration, especially DRC cobalt and China-linked lithium processing.
Then there are the smaller critical minerals where US import dependence is ugly. Tantalum, used in serverboard capacitors, is 100% import dependent. Germanium, used in fiber optics and high-speed transistors, is 100% import dependent, with China controlling more than 60% of refining. Indium, arsenic, and fluorspar are also 100% import dependent. Platinum is 85% import dependent, and palladium is 36% import dependent. These are not headline commodities, but they sit inside the advanced manufacturing chain.
My overall take is that the AI trade has been too narrow. First it was treated as a GPU story. Then it became a power story. Then it became a data center capex story. I think the next layer is metals.
Copper is the main volume bottleneck. Silver is already in a multi-year structural deficit. Gallium is a geopolitical chokepoint. Rare earths are a processing chokepoint. Gold is a cost pressure. Zinc matters indirectly through germanium. Aluminum looks manageable. Lithium, nickel, and cobalt matter through backup power, but EVs remain the bigger demand driver.
I am not saying buy every mining stock. A lot of juniors are garbage. A lot of explorers will dilute shareholders into oblivion. Permitting risk is real. Financing risk is real. Execution risk is real. Many deposits will never become mines.
But the macro signal is hard to ignore. AI scales on software timelines. Mining scales on permitting timelines. Refining scales on industrial policy timelines. Grid infrastructure scales on utility timelines. Those timelines do not match, and that mismatch is where the opportunity and risk sit.
The bottom line is simple: AI does not just need more GPUs. It needs more copper, more silver, more gallium, more rare earth processing, more refining capacity, more grid equipment, more transformers, more substations, and more secure supply chains.
The digital economy is running straight into the physical economy. And when that happens, the companies closest to real supply may matter a lot more than the market expects.