美股稀土矿商股价盘前上涨，MP Materials涨4.6%，United States Antimony涨10.2%，Critical Metals涨5%。

Core Viewpoint - The stock prices of U.S. rare earth mining companies have seen significant pre-market increases, indicating positive market sentiment towards the sector [1] Group 1: Company Performance - MP Materials' stock price increased by 4.6% [1] - United States Antimony's stock price rose by 10.2% [1] - Critical Metals' stock price went up by 5% [1]