MP Materials' stock price has skyrocketed on positive news, but there's still a lot of work to be done. And that has led to a huge boon for MP Materials (MP -10.99%), which produces rare-earth metals in the United States. There have been big investments in MP MaterialsThe importance of MP Materials is highlighted by two big events. And yet MP Materials' stock price has risen more than 140% since July 9, the day before the government investment was announced. Thinking long term will be keyAt this point, it looks like a lot of good news has been priced into MP Materials' stock.