When Rare Earth Prices Remember: New Study Finds Some Elements May Stay Expensive for Years

Highlights

• A Madrid-led study using ARFIMA modeling found that magnet rare earth prices—including Nd, Pr, Tb, and Dy—exhibit unusually persistent behavior after price shocks.
• Unlike most commodities, disruptions to these strategically critical elements may take years to normalize, with lasting impacts on EV, defense, and wind energy supply chains.
• The findings reinforce the REEx Great Powers Era 2.0 thesis: magnet rare earths are transitioning from commodities to strategic assets in a global industrial sovereignty race.
• The study's data ends in May 2022, predating China's 2025 export controls, meaning current market dynamics may show even greater price persistence than the paper captures.

A new study led by Dr. Manuel Monge of Universidad Francisco de Vitoria in Madrid, alongside collaborators Jorge Aracil Jordá (Universidad Pontificia de Comillas) and Juan Infante (Universidad Villanueva), examines a question of growing importance for investors, manufacturers, and policymakers: when rare earth prices spike, do they eventually return to normal, or do some price shocks become permanent? Analyzing ten years of price data for key rare earth elements used in electric vehicles, wind turbines, defense systems, and advanced manufacturing, the researchers found that while most rare earth prices eventually revert toward historical norms, several strategically important elements—including neodymium (Nd), praseodymium (Pr), terbium (Tb), and dysprosium (Dy)—show unusually persistent price behavior. In practical terms, disruptions affecting these materials may have long-lasting impacts on supply chains and industrial costs.

Study Methods

The researchers analyzed monthly rare earth price data from September 2012 through May 2022 using a statistical technique known as an ARFIMA (autoregressive fractionally integrated moving average) model (opens in a new tab). Unlike conventional forecasting tools, ARFIMA can detect "long memory" effects—whether markets continue to feel the effects of past shocks years later. The team examined price volatility, persistence, skewness, and mean reversion across multiple rare earth elements.

What They Found

The most important finding is that not all rare earths behave alike. Neodymium, praseodymium, terbium, and dysprosium—the very elements most critical for high-performance permanent magnets—displayed the highest volatility and persistence. Price shocks affecting these materials appeared far more durable than for other rare earths. By contrast, many other rare earth prices eventually reverted toward long-term averages.

For Rare Earth Exchanges™ (REEx) readers, this finding strongly reinforces the strategic importance of magnet rare earths. These are the materials increasingly required for electric vehicles, robotics, drones, wind turbines, advanced electronics, and defense applications.

Great Powers Era 2.0 Meets Market Reality

The findings align closely with the REEx Great Powers Era 2.0 thesis. The Spain-based authors largely frame rare earth demand through renewable energy and EV adoption. However, REEx would argue that the persistence of NdPr, Dy, and Tb prices reflects something broader: a global race for industrial sovereignty. Nations are increasingly competing for control of supply chains, refining, separation, magnets, and advanced manufacturing capacity. The market may be signaling that certain rare earths are no longer just commodities; they are becoming strategic assets.

Limitations and Controversies

The study analyzes data ending in May 2022, before China's 2025 export-control measures and the recent acceleration of Western industrial policy initiatives. Some statements regarding China's share of global production also reflect older industry estimates; China remains dominant, but current market shares differ from the paper's cited figures.

Additionally, statistical persistence does not necessarily predict future prices. Technology changes, recycling breakthroughs, substitution, or major new supply sources could alter long-term market dynamics.

Why It Matters

For investors, policymakers, and manufacturers, the message is straightforward: some rare earth price shocks may not quickly disappear. As the world enters Great Powers Era 2.0, understanding which rare earths exhibit persistent pricing behavior may become as important as understanding where they are mined. Supply security increasingly depends not just on geology, but on geopolitics, processing capacity, and industrial strategy.

Citation: Monge, M., Aracil Jordá, J., & Infante, J. (2026). Fractional Integration Analysis of Rare Earth Material Price Dynamics for Mechanical System Design and Sustainable Manufacturing. Reports in Mechanical Engineering, Vol. 7, No. 1, pp. 287–297.