A polysilicon price floor plus 15% Section 232 tariff, effective December 4, 2026, favors US producers and hurts those reliant on cheap Chinese poly. Corning's Hemlock is the US champion the policy was written for, and First Solar uses no polysilicon, so rivals' costs rise while its stay flat. Daqo's $5/kg Chinese poly is the target, Sunrun faces higher panel costs with subsidies gone, and Canadian Solar's US plants depend on imported inputs. Installers' Q4 prints may be inflated by stockpiles. x.com

