MP Materials Predicts Plunge in Heavy Rare Earth Demand as Magnet Makers Embrace Substitutes

MP Materials has announced that demand for expensive heavy rare earths like dysprosium and terbium is expected to fall sharply as magnet manufacturers increasingly adopt alternative materials.

This shift is driven by two main factors: China's export restrictions on rare earths, which encouraged a search for alternatives, and technological advances that allow for making powerful magnets with less or no heavy rare earths.

This trend creates a split in the market: while demand for core light rare earths like NdPr remains strong, supported by government policies, the future for heavy rare earths is becoming more uncertain due to this "thrifting" trend.

The story of rare earth elements is undergoing a significant rewrite.

The focus is shifting from a simple narrative of scarcity to a more nuanced one of strategic substitution. MP Materials recently highlighted that demand for the most expensive heavy rare earth elements (HREEs), specifically dysprosium (Dy) and terbium (Tb), is set to decline. This isn't because magnets are going away; rather, it's because manufacturers are getting smarter about how they make them, a trend known as 'heavy-REE thrift'.

So, what's driving this change? The first major push came from policy. In 2025, China implemented export controls on certain rare earths and the high-performance magnets made from them. This created a supply shock for companies in the U.S., Japan, and Europe. Faced with uncertainty and higher costs, major consumers like TDK publicly stated they were actively seeking alternatives. This policy move effectively lit a fire under the industry to innovate away from reliance on Chinese-controlled HREEs.

Secondly, technological solutions have matured to meet this challenge. For years, adding Dy and Tb to NdFeB magnets was the standard way to boost their performance at high temperatures, which is crucial for things like electric vehicle motors. However, companies like Germany's VAC and Japan's Proterial have now successfully developed and are marketing HREE-free or HREE-lean magnets. Techniques like grain-boundary diffusion allow for a much more precise and minimal use of these elements, achieving similar performance with far less material. These aren't just lab experiments anymore; they are becoming commercially viable options.

Finally, the economics are strongly reinforcing this trend. U.S. government initiatives, such as a price floor for the light rare earths (LREEs) Neodymium-Praseodymium (NdPr) and plans for a strategic stockpile called 'Project Vault', have stabilized the core of the magnet market. With the price and supply of NdPr looking more secure, it allows magnet makers to focus their cost-cutting efforts where it hurts most: the extremely expensive Dy and Tb additives. It makes more sense to engineer out a small but costly component than to redesign the entire magnet.

In conclusion, we are seeing a clear divergence in the rare earth market. The future for core LREEs like NdPr, essential for magnet volume, appears solid and supported. In contrast, the future for HREEs like Dy and Tb is under pressure from substitution. For investors, this means it's no longer enough to bet on 'rare earths' as a monolith; the distinction between the lights and the heavies has become more important than ever.

Heavy Rare Earths (HREEs): A group of rare earth elements, including dysprosium (Dy) and terbium (Tb), that are less abundant and often more expensive. They are used as additives to improve magnet performance at high temperatures.
Light Rare Earths (LREEs): More common rare earth elements like neodymium (Nd) and praseodymium (Pr), which form the main body of high-performance NdFeB magnets.
Coercivity: A measure of a magnet's ability to resist demagnetization from an external magnetic field or high temperatures. Adding HREEs traditionally increases coercivity.

MP Materials Predicts Plunge in Heavy Rare Earth Demand as Magnet Makers Embrace Substitutes

MP Materials has announced that demand for expensive heavy rare earths like dysprosium and terbium is expected to fall sharply as magnet manufacturers increasingly adopt alternative materials.

The story of rare earth elements is undergoing a significant rewrite.

Heavy Rare Earths (HREEs): A group of rare earth elements, including dysprosium (Dy) and terbium (Tb), that are less abundant and often more expensive. They are used as additives to improve magnet performance at high temperatures.
Light Rare Earths (LREEs): More common rare earth elements like neodymium (Nd) and praseodymium (Pr), which form the main body of high-performance NdFeB magnets.
Coercivity: A measure of a magnet's ability to resist demagnetization from an external magnetic field or high temperatures. Adding HREEs traditionally increases coercivity.