Western governments are injecting large sums into critical mineral markets in an effort to diversify supply away from China. The scale of those commitments has prompted concerns among executives, investors and analysts that government-led incentives could, if uncoordinated, create gluts that mirror past commodity overproduction episodes.
"There needs to be some coordination between Western governments as they seek to incentivise new production," said Brett Beatty, a partner at Resource Capital Funds, a mining-focused private equity firm that supplies the U.S. government with niobium and tantalum via its holdings in Global Advanced Metals. "The biggest risk is we all do our own thing. We all generate multiples of volumes the world needs and then you just crush everything, because you’ve got an oversupply."
The U.S. has committed more than $20 billion in support for its critical minerals industry through various programs and financing tools, including $10 billion earmarked for a stockpile known as Project Vault. Australia has set aside at least A$13 billion, equal to $9.42 billion, across multiple initiatives that include a national reserve. Other like-minded economies have also pledged project-level funding and incentives.
The International Energy Agency estimates the broader critical minerals market at about $320 billion and expects it to double by 2040. Within that market, rare earths - the group of 17 elements used to make high-strength magnets integral to defence equipment, advanced manufacturing and medical devices - were valued at roughly $6.4 billion in 2024 according to IEA figures. Reuters calculations show that promises of financial aid from the U.S., European Union, Australia and Japan to rare earths projects worldwide already exceed that market valuation.
History offers cautionary examples. In the 1980s and early 1990s, subsidies, low-cost energy and guaranteed prices spurred massive output in several sectors - creating the so-called "butter mountains," surges of Russian aluminium and oversupply of Australian wool - which flooded global markets and depressed prices across borders. Those episodes serve as a reminder of how policy-driven production increases can produce unwelcome market outcomes.
Some analysts see a risk that the current wave of investment will tip certain rare earths into surplus in coming years. "The wave of Western investment is already set to tip some rare earths into surplus in the coming years," said David Merriman of Project Blue, a consultancy. He added that large surpluses were not inevitable if governments moderate support. "Government-led stockpiles can stop purchasing, which can have a market-balancing impact and there is only limited capacity supported by price floors or guaranteed purchasing by governments at present," Merriman said.
Producers have pushed back against alarmist readings of stockpiling. Amanda Lacaze, CEO of Lynas Rare Earths - currently the largest rare earths producer outside China - told an audience on May 6 that existing stockpiles were not large enough to swamp markets. "I’m pretty alert to how much rare earths are sitting in stockpiles around the world right now and it’s not very much," she said.
Australian resources minister Madeleine King argued the country's approach differs from past agricultural interventions. "This is about a targeted, project-based investment to make something work, for creating secure supply chains for Australian manufacturing, but also for our neighbours and like-minded partners," she told Reuters earlier this year, contrasting it with the wool-era policies.
Some coordination among Western governments is under discussion. Officials from Group of Seven countries have been in conversations to establish a permanent secretariat to preserve supply-increasing plans beyond rotating presidencies, according to five sources familiar with the talks. The effectiveness of any coordination mechanism remains to be seen.
Government intervention has produced mixed outcomes in other resource-rich economies. The Democratic Republic of Congo has built up cobalt stockpiles and implemented export quotas to increase revenue from mining. In the short term, these measures lifted global prices and bolstered state coffers, but the approach carries risks. "Prolonged restrictions risk accelerating the shift to substitutes as buyers seek more reliable supplies," said Geraud-Christian Neema, Africa editor at the China Global South Project, a non-profit that follows Beijing's role in emerging economies. He pointed to a challenging trade-off: easing quotas could lead to rapid export increases from producers such as China’s CMOC and erase recent gains, while maintaining tight limits could weaken demand over time.
Indonesia pursued a related strategy in 2020 when it banned nickel ore exports to encourage domestic processing and capture more value locally. Within three years, the policy coincided with a tripling of production and helped establish Indonesia as a dominant global supplier. However, policymakers later imposed quotas to counter overproduction and price declines - and last week, Indonesia unveiled a plan to centralise control of commodity exports.
Some experts propose building processing capacity at existing operations as a way to reduce oversupply risk by turning target metals into byproducts rather than allowing pure price signals to drive standalone projects. Huw McKay, a visiting fellow at The Australian National University and former chief economist at BHP, said that model is already underway in Western Australia. Alcoa and Japan’s Sojitz, with backing from Japanese, Australian and U.S. governments, are adding a plant to extract gallium at Alcoa’s alumina operations near Perth. Trafigura has moved to recover antimony from its Nyrstar lead smelter in South Australia.
Despite large capital outlays typical of major miners, McKay characterised Western government contributions as "more like seed funding." That framing underlines the gap between mining-sector capex requirements and the relative scale of public support to nudge projects into existence.
Key takeaways
- Large-scale government funding across the U.S., Australia and allied economies aims to secure critical minerals supply chains but could produce oversupply if uncoordinated.
- Historical examples such as agricultural and aluminium overproduction highlight the risks of policy-driven market distortions that can depress prices internationally.
- Measures to add processing capacity at existing sites and discussions among G7 members about a permanent secretariat are ways policymakers and industry are attempting to limit oversupply risks.
Risks and uncertainties
- Uncoordinated incentives across countries could generate multiples of the volumes the market requires, leading to price weakness - a risk for miners, processors and related capital-intensive sectors.
- Prolonged export restrictions in producer countries may briefly lift prices but could prompt buyers to substitute or diversify, undermining long-term demand for certain minerals - affecting downstream manufacturers and defence supply chains.
- Efforts to expand capacity rapidly risk creating surpluses in niche markets such as rare earths, where current combined pledged funding may already exceed market size, posing valuation pressures on project developers and investors.
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