By Vallari Srivastava

(Reuters) -Shares of rare earths miners rose in morning trade on Thursday after China tightened export controls on metals crucial to the weapons and electronics industries, aiming to limit shipments to overseas defense firms and semiconductor users.

The announcement follows U.S. lawmakers’ call for broader bans on the export of chipmaking equipment to China and expands on sweeping controls Beijing announced in April, which had caused shortages around the world.

The U.S. government has been ramping up its efforts to reduce reliance on China by investing in companies it considers essential to national security, including critical minerals and semiconductor companies.

Shares of Critical Metals surged nearly 18% to $13.86 and Ramaco Resources surged 11%.

Shares of Ni

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