MP Materials unveiled a multibillion-dollar deal with the U.S. government on Thursday to boost output of rare earths and help loosen a stranglehold by top producer China on the minerals vital for military applications,

Lynas Rare Earths (OTCPK:LYSDY) (OTCPK:LYSCF), the largest rare earths producer outside China, soared as much as 20% to its highest level since mid-August 2022, on track for its best trading day since April 2020 after MP Materials' (MP) deal with the U.

The Defense Department on Thursday became the largest shareholder in MP Materials, which owns the only rare earth mine in the U.S., amid a surge in demand for rare earths mined in the U.S. as China has curbed its rare earth exports amid a trade war with the U.S.