MP Materials (MP), a cornerstone of America’s rare-earth industry, has been on a turbulent ride. Its shares peaked near the $100 mark in mid-October, fueled by fears of Chinese export restrictions, only to slide 3.57% over the past month as U.S.-China trade tensions eased. It now trades 39.7% below its 52-week high. On Nov. 24, however, the stock staged a rebound, climbing 6.8% after BMO Capital (BMO) upgraded it from “Market Perform” to “Outperform” rating. It is the equivalent of “Buy” from “Hold,” even ...