Key Takeaways Alibaba, JD.com and PDD plunged 8.5%, 6.2% and 5.3% on tariff fears.Trump's 100% tariff threat responds to China's rare-earth export controls.Global markets reacted defensively. The S&P 500 fell 2.7%, Nasdaq 3.6%.On Friday, Oct. 10, U.S.-listed Chinese technology giants Alibaba Group Holding Limited (BABA) , JD.com, Inc. (JD) and PDD Holdings Inc. (PDD) suffered a sharp selloff as renewed U.S.-China trade tensions reignited fears of an escalating economic clash.BABA, JD and PDD fell 8.5%, 6.2% ...