MP Materials Corp.'s stock plummeted 5.12% during intraday trading on Wednesday. The sharp decline followed a significant sell-off in the previous session, indicating continued negative sentiment among investors.

The primary driver of the sell-off was a stark warning from the company's CEO, Jim Litinsky, who stated that prices for heavy rare earths like dysprosium and terbium could "decline significantly from current levels." This cautionary outlook overshadowed the company's otherwise strong first-quarter results, which included a 49% year-over-year surge in revenue.

Market concerns were amplified by the company's report of a 63% increase in neodymium-praseodymium oxide output, fueling worries about a potential loosening of supply and demand dynamics. The stock's decline was also attributed to profit-taking pressure, as the shares had rallied over 18% in the five trading sessions prior to the warning.