U.S. President Donald Trump posted on the social media platform Truth Social on Friday, threatening to impose "massive tariff increases" on goods imported from China, citing China's plans to implement new controls on rare earth exports.

In his post, Trump stated that if Beijing moves forward with export restrictions, the United States will "enact the toughest economic countermeasures in history." Analysts believe this remark indicates a renewed escalation of Sino-U.S. trade tensions, rapidly dampening market expectations for improved bilateral relations.

Affected by the news, U.S. stock markets fell sharply. The Nasdaq dropped over 2%, the S&P 500 index fell 1.6%, and the Dow Jones Industrial Average declined over 1%. Investors are concerned that if the trade dispute between the U.S. and China escalates again, it could further disrupt global supply chains and introduce new uncertainties to an already sluggish world economy.

Market observers noted that Trump's threat regarding rare earths is not merely symbolic. As a critical raw material for key industries such as electric vehicles, batteries, and semiconductors, rare earths are one of the core areas of technological and industrial competition between the U.S. and China. If substantive friction arises in this area, the global high-tech manufacturing sector could face a chain reaction.