Why this rare-earth materials stock has skyrocketed This rare-earth materials producer just hit a mother lode with a groundbreaking public-private partnership. Skyrocketing stocks tend to attract plenty of attention from investors. Think Palantir Technologies or Robinhood Markets, both of which have more than doubled this year. But another stock has been an even bigger winner. This stock is up over 300% in 2025 -- and you may have never heard of it. MP who? MP Materials (MP 3.74%) has delivered a year-to-da ...