White House Imposes New Tariffs on Polysilicon Imports Citing National Security

President Donald Trump signed a proclamation implementing new trade measures on imports of polysilicon and derivative products. These measures, which include a minimum import price program for polysilicon and a 15% tariff on derivative products, are set to take effect on December 4, 2026. The administration stated the actions are based on national security concerns and the need to strengthen domestic supply chains.