MP Materials vs. USA Rare Earth: Which Mining Stock to Buy?

Amid rising U.S.-China trade tensions, securing a domestic supply of critical minerals has become a national priority. China currently dominates the rare earth supply chain, controlling 70% of extraction and 90% of processing. In response, the U.S. government is investing heavily in two domestic mining companies to reduce this dependency.

USA Rare Earth recently secured a massive $3.1 billion funding package, including a $1.6 billion letter of intent from the Department of Commerce. This capital will fund the expansion of its magnet manufacturing facility in Stillwater, Oklahoma, and future development of the Round Top mine in Texas, targeting commercial production by 2028.

Meanwhile, MP Materials is further along in its development. It owns and operates the Mountain Pass mine in California, the only large-scale rare earth production facility in North America. The company has entered a significant public-private partnership with the U.S. Department of Defense, which includes a price floor for its products and a 15% ownership stake.

Both companies are central to the U.S. strategy of building a homegrown supply chain for the rare earth elements and magnets essential for electric vehicles, wind turbines, and defense systems. The government's financial backing for both firms underscores the strategic importance of this sector.

This isn't just industrial policy; it's a major investment theme with clear winners and losers. The company that can reliably and profitably produce these materials stands to capture a multi-billion dollar market as global demand surges and supply chains decouple from China.

For investors, the key differentiator is execution risk. MP Materials has a clear advantage because it is already producing. It reported a record 718 metric tons of neodymium-praseodymium (NdPr) oxide in Q4, a 74% year-over-year increase. Revenue from its existing operations funds future growth.

USA Rare Earth, while well-funded, is still in the construction and commissioning phase. Its Stillwater facility is expected to be commissioned soon, but the Round Top mine is years away from production. This timeline creates uncertainty about when it will generate meaningful revenue and profits.

Most importantly, MP Materials has secured unparalleled revenue certainty through its Department of Defense deal. The DoD has committed to buying 100% of the output from its new '10X' magnet facility and guarantees a minimum annual EBITDA of $140 million. This de-risks a significant portion of its future expansion, something USA Rare Earth cannot yet match.