The chemistry
Neodymium and praseodymium are the two heavy lanthanides that, sintered with iron and boron, give the magnetic field intensity needed for permanent-magnet motors in:
- All-electric vehicle drivetrains (1.5-2 kg/vehicle of NdPr)
- Direct-drive wind turbines (200-500 kg/MW)
- HVAC variable-speed compressors (50-200 g/unit)
- Industrial servo drives, surgical robotics, computer hard drives
There is no commercially deployed substitute that matches both the magnetic intensity and the temperature-stability of NdFeB. Ferrite magnets and induction motors exist; they trade away 20-40% of efficiency, which is non-trivial in the EV and wind sectors.
The supply chain — and where the chokepoint actually is
Mining is the part most people know about. China produces about 60% of global rare-earth oxide tonnage; Mountain Pass (USA), Lynas Mt Weld (Australia) and Bayan Obo's by-product flows from iron ore make up the rest. Within reason, mining is not the bottleneck.
Separation is where the chokepoint lives. The wet-chemistry solvent-extraction process that separates the 15 individual rare-earth elements is dominated by Chinese facilities (~85% of global separated NdPr capacity). Lynas runs the largest non-Chinese separation plant in Malaysia (about 11,000 t/yr NdPr capacity). The MP Materials Stage III separation in California is ramping but at single-digit thousand-tonne scale.
Magnet manufacturing is the second bottleneck. The sintering, machining and coating expertise sits 85-90% in China. Recent Western capacity additions (Vacuumschmelze in Germany, Quadrant in the UK, Phoenix Tailings in the US) total perhaps 5,000 t/yr against ~80,000 t/yr global demand.
The 2025 export-control vintage
In April 2025 Beijing added gallium and germanium to its formal export-licensing regime. In December 2025 the list was extended to include separated dysprosium and terbium (the heavy rare earths used as additives for temperature stability). NdPr itself is not yet on the formal list, but importers report tightened informal scrutiny on shipment documentation since Q1 2026.
Why the stress score is 0.79 and not 0.95
The current $92/kg price is roughly 2.4× the 5-year average but not at the panic levels seen in late 2021. Three reasons:
- EV demand growth has slowed (China + EU plateau at 45-50% market share for new vehicles)
- Western magnet stockpiling (US DoD National Defense Stockpile expansion, EU strategic reserve framework)
- Vehicle-to-vehicle magnet substitution research (ferrite + redesign trials at Tesla, BMW, Volkswagen)
If any of those three slips, the stress score moves into the 0.85+ tier within 6-12 months.
What we're watching
- China customs export data for separated rare-earth oxides (monthly)
- Lynas Mt Weld feedstock contracts (long-term off-take signals capacity ramp)
- DoE Critical Materials Institute publications on substitution research
Source: shortage.life commodities table (`rare-earths` slug, NdPr basket reference); scenarios table entry `rare-earth-squeeze-2026`.