Demand for some of these critical metals is rising sharply, driven by the development of electric cars and the renewable energy sector, which is a major consumer.
China is both the largest producer (85% of world production) and the largest consumer of the rare earths market, and has just cleaned up its illegal mines.
Demand is such that by 2025 China will consume twice as much as it will be able to produce.
One can invest in Rare Earth Metals through the tracker REMX (VanEck Vectors Rare Earth / Strategic Metals ETF, in $)
Find the Bloomberg article on Rare Earth Metals