Malaysia’s ban on exports of unprocessed rare earth metals this week signals that the Southeast Asian country has a realistic shot – on its own terms – at feeding the mineral-hungry United States amid its strained trade ties with the world’s dominant supplier, China, according to analysts.Kuala Lumpur will bar exports of unprocessed rare earth minerals, which are globally prized raw materials used in a range of electronic hardware, to keep supplies onshore for investment in downstream...