The Rare Earth Supply Chain's Structural Vulnerability
There is perhaps no more acute supply chain vulnerability in the US industrial and defense base than rare earth elements. These seventeen metals — including neodymium, praseodymium, dysprosium, and terbium — are essential components of the permanent magnets used in virtually every electric motor, wind turbine generator, and advanced weapons guidance system. Without them, the electrification transition, the renewable energy buildout, and the defense modernization programs that define US national security strategy are physically impossible.
China currently controls approximately 85% to 90% of global rare earth processing and separation capacity. Even where rare earth ores are mined in other countries, they are shipped to China for the chemical separation process that converts mixed rare earth concentrate into the individual elements required for specific applications. The United States has spent the better part of three decades allowing this dependency to develop, and is now engaged in a multi-year effort to rebuild domestic capability that China's decades of investment advantage makes extremely difficult to replicate quickly.
MP Materials is the central company in the US effort to develop an end-to-end domestic rare earth supply chain.
Mountain Pass and the Upstream Position
MP Materials operates the Mountain Pass mine in the Mojave Desert of California — the largest rare earth mining and processing facility in the United States, and one of the highest-grade rare earth deposits outside of China. Mountain Pass was previously operated by Molycorp, which declared bankruptcy in 2015 following a period of deliberate Chinese price suppression designed to eliminate non-Chinese competition. MP Materials acquired the facility out of bankruptcy and has systematically rebuilt its production capability.
The mine produces a mixed rare earth carbonate concentrate that contains the suite of elements — dominated by the light rare earths neodymium and praseodymium — that are the commercial priority for permanent magnet applications. MP's Stage II development, now operational, moves the company downstream into separated rare earth oxides — removing the dependency on Chinese separation and providing the feedstock required for magnet manufacturing directly.
Stage III, which will take MP into magnet alloy and finished magnet production, is the completion of the full vertical integration strategy. When Stage III is operational, MP Materials will be one of the only companies outside of China capable of delivering finished rare earth permanent magnets from a domestic mine and processing base.
Defense and EV Applications: Dual Structural Demand
The permanent magnets produced from MP's rare earths serve two demand vectors that are both growing rapidly and cannot be easily substituted.
In defense applications, rare earth permanent magnets are used in precision-guided munitions, radar systems, submarine propulsion, fighter aircraft actuators, and communications equipment. The United States Department of Defense has identified rare earth supply chain dependency as a critical vulnerability and is actively pursuing domestic supply relationships under the Defense Production Act and related procurement authorities. MP Materials is the primary domestic beneficiary of this policy priority.
In EV applications, the permanent magnet electric motor is the dominant drivetrain technology for battery electric vehicles, and each motor requires meaningful quantities of neodymium-praseodymium alloy. As EV adoption scales toward the levels implied by automotive OEM electrification commitments — and as geopolitical risk makes Chinese-sourced rare earth magnets a strategic liability for US-oriented supply chains — the demand for domestic rare earth magnet supply grows proportionally.
The Competitive Moat and Timeline to Scale
Building a competing rare earth mining and processing facility requires identifying a viable deposit, completing the permitting process (typically five to ten years in the United States), and constructing the mining, milling, and chemical separation infrastructure. The capital cost of this development for a facility of meaningful scale runs into the hundreds of millions to billions of dollars.
MP Materials' existing infrastructure is therefore not just an operational asset — it is a permitting and capital investment that would take a decade or more to replicate. The moat is regulatory and temporal, not just financial. No competitor can quickly replicate what took thirty years of geological discovery, permitting, construction, and operational refinement to create.
GZC Thesis Summary
We track MP Materials as a high-conviction position in the Commodities pool based on its unique position as the only scaled rare earth producer in the United States, structural defense and EV demand for its products, multi-decade moat from permitting and capital investment that cannot be quickly replicated, and significant policy tailwinds from US government efforts to secure domestic critical minerals supply. The rare earth chokepoint is as structural as any bottleneck in our coverage universe.
