Stocks tied to rare earths jumped after Trump threatened countermeasures against China, noting the country was holding the world "captive" over the metals.

China has leveraged its control of the sector in trade talks with the U.S. by threatening a disruptive global shortage of the critically-needed minerals.

After tightening restrictions during the tariff tit-for-tat in April, China has further amped up controls on the minerals, which are essential for the tech and auto industries.…

China tightens export controls on rare earths and related technologies to safeguard national security, impacting global supply chains.

Rare earths stocks were jumping Thursday

Stock markets dropped on Trump's bellicose Truth Social post that said China is "becoming very hostile" in seeking tough export controls on rare earths.

Stocks tied to rare earths jumped after Trump threatened countermeasures against China, noting the country was holding the world "captive" over the metals.

President Donald Trump on Friday threatened China with a "massive" increase in tariffs in retaliation for Beijing imposing strict controls on rare earths.