Shares of USA Rare Earth (USAR -3.77%) jumped this week, up from last Thursday's close at 1 p.m. ET for the Fourth of July holiday by 10.4% as of 1:30 p.m. ET Friday. The rise came as the S&P 500 (^GSPC -0.24%) and Nasdaq-100 both gained 0.6%.USA Rare Earth stock jumped -- alongside most of the critical mining industry -- after MP Materials announced yesterday it had inked a major deal with the Department of Defense (DoD).A big move for domestic miningThe Trump administration, which has been considering dir ...