MP Materials was in the right place at the right time, but investors may be counting on more good news than is reasonable to expect right now.MP Materials (MP -0.47%) has seen a phenomenal stock price advance over the past year, with the shares up over 450%! That was largely driven by a price move which started in May and really took off in July. That was when the United States government agreed to invest $400 million in the rare-earth element producer.There's a lot to unpack here as you try to decide if th ...