In boardrooms from Brussels to Washington, the race to secure rare earths supply chains independent of Chinese dominance has become a geopolitical imperative. Yet one of the most promising contenders in that race — Mkango Rare Earths Limited — is confronting a structural hazard embedded in the very financing mechanism meant to propel it forward.
Mkango, a subsidiary of Canada's Mkango Resources Ltd. registered in the British Virgin Islands, is advancing a SPAC merger with Capitol Federal (NASDAQ: CPTK). But analysts now warn that the transaction's redemption risk is not a remote tail scenario. Risk assessments assign the prospect of a capital-gutting redemption wave a high likelihood with catastrophic severity — a confidence level of 0.70. That is not a worst-case outlier. It is the base case.
Two Projects, One Strategic Vision
The ambition behind the deal is significant. Mkango controls the Songwe Hill rare earths development project in Malawi, a deposit rich in neodymium and praseodymium — the materials at the core of permanent magnets used in electric vehicle motors and wind turbines. Alongside it, the company is developing a rare earths separation facility in Pulawy, Poland, targeting the European market directly.
That Polish facility carries outsized strategic weight. China currently controls an estimated 85–90% of global rare earths refining capacity. Europe's industrial base — its automotive sector, its defence supply chains, its renewable energy ambitions — remains critically dependent on Chinese processing. The EU's Critical Raw Materials Act, enacted in 2024, explicitly targets reducing that dependence, but upstream policy intent means little without downstream investment.
Mkango's Pulawy project represents one of only a handful of credible efforts to build separation capacity on European soil. A funding failure would not merely disappoint shareholders; it would widen a strategic gap that Western policymakers have spent years trying to close.
The SPAC Mechanism's Structural Flaw
Special Purpose Acquisition Companies — SPACs — were marketed during their early 2020s boom as a democratised route to public markets, particularly for capital-intensive sectors like resource development that struggle to attract conventional IPO interest. The promise was straightforward: pool institutional capital in a trust, identify a merger target, and deliver growth financing to companies that need it.
The reality has proven more complicated. Under standard SPAC terms, shareholders who disapprove of a proposed merger — or who simply prefer to recover their capital — can redeem their shares at close to the original $10 trust value before the deal closes. In recent years, redemption rates of 80% to 90% or higher have become routine. For a junior miner requiring multi-year, capital-intensive buildouts across two continents, even a moderately elevated redemption rate can be existential.
The pattern is not unique to Mkango. Across the SPAC universe, resource and deep-tech companies that relied on merger proceeds to fund long-cycle development have repeatedly found themselves undercapitalised at close. The mechanism that promised access to growth capital effectively allows institutional investors to participate in the price discovery process while retaining full downside protection — leaving operating companies exposed.
A Global Supply Chain at Stake
The timing compounds the pressure. Rare earths markets have faced acute volatility since China began restricting exports of certain critical minerals in 2023 and 2024, responding to Western semiconductor and EV supply chain policies. Japan, South Korea, and the European Union have accelerated domestic processing initiatives. The United States has channelled funding through the Defence Production Act and the Department of Energy's loan programmes to support upstream mining and midstream refining.
Against that backdrop, the failure of a project like Songwe Hill-to-Pulawy — one of the few pipelines linking African extraction to European processing — would represent a meaningful setback for supply chain diversification efforts that remain, by most assessments, years behind schedule.
Should redemptions leave Mkango materially undercapitalised, the company faces a narrow set of unattractive options: delay feasibility advancement at Songwe Hill, shelve the Pulawy separation facility, or seek dilutive secondary financing in a rare earths equity market already battered by price weakness and investor fatigue.
The Broader Lesson for Critical Minerals Finance
Mkango's predicament crystallises a tension that policymakers and market participants have not yet resolved. Western governments want critical minerals supply chains. They have passed legislation, convened summits, and issued strategies. But the financing architecture required to move projects from drill hole to production remains fragmented, risk-averse, and, in the case of SPACs, structurally misaligned with the long-cycle capital needs of resource development.
Until that gap is bridged — whether through direct state financing, offtake-backed project debt, or reformed capital market structures — the geopolitical ambition of critical minerals independence will continue to collide with the commercial reality of how junior miners actually raise money.
For Mkango, the outcome of the CPTK merger will be a signal watched closely not just by its own shareholders, but by every government and institution that has staked credibility on the promise of a China-independent rare earths supply chain.