MP Materials CEO warns investors to approach suddenly hot rare earths industry with caution

1. MP warns investors about cautious optimism in rare earth projects. 2. The Defense Department's equity stake and price floor support MP's position. 3. MP aims to reduce US dependency on China's rare earth supply. 4. CEO highlights the long-term challenges in the rare earth industry. 5. Rare earths are essential for key U.S. technologies and defense.