Check out the companies making the biggest moves midday: Rare earth stocks — The group rose broadly after President Donald Trump said China was holding the world "captive" over the minerals, threatening countermeasures. MP Materials traded 13% higher along with USA Rare Earth . Magnificent Seven — Megacap tech stocks tumbled Friday after Donald Trump threatened a "massive" tariff hike against China. each of the Magnificent Seven stocks were down more than 1%. Amazon tumbled more than 3%, Nvidia fell 1.5%, while Apple slipped 2%. China stocks — Shares of Chines companies traded in the U.S. fell broadly after Trump's threat against China. Alibaba and Baidu fell more than 6% each. PDD Holdings shed 4%. Rocket Lab — The space company's stock jumped more than 4% after it secured contracts for m

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