Trump Weighs Polysilicon Price Floor, Tariffs to Counter China

A quiet but consequential piece of trade machinery is being loaded. Reuters is reporting, citing four people familiar with the plan, that the Trump administration is preparing to set a price floor and impose tariffs on imports of polysilicon and derivative products used in chips and solar panels. The framing matters, because a floor is not just a duty; it is a minimum US import price regardless of where the world spot market goes.

The backdrop is a market where China has overtaken global solar-grade polysilicon supply. One widely cited figure from 2022 put China's share at 89% and expanding since, and that dominance has been squeezing the surviving US suppliers. The domestic 'big three', Hemlock, Wacker and REC Silicon, reportedly saw their combined market shrink from $1 billion in 2011 to $107 million in 2018 after Chinese duties on American polysilicon, and REC Silicon has since dropped out of the merchant polysilicon business. A price floor changes those economics in a way a headline tariff rate on its own does not.

The measure would stack on top of Section 301 duties of 50% that Chinese polysilicon already carries, and on top of a Section 232 investigation the Commerce Department launched in July 2025 into polysilicon and its downstream forms. The reporting indicates the plan reaches beyond raw polysilicon to derivative products, which is the pointed part for buyers: silicon wafers, solar cells and panels could all be pulled in.

The honest caveat is that this is single-outlet reporting sourced to four unnamed people, and the specifics readers actually need to price the impact, from the floor level to the tariff schedule to the treatment of allied suppliers to the exact derivative-product scope, are not in the story. Take the framing as directional, not settled.

Who benefits if it lands as described is narrow and fairly obvious: the remaining US polysilicon producers, and any restart or greenfield project that had been marginal at prevailing spot prices. Who feels it is broader, from solar developers whose module costs move to any semiconductor buyer with residual Chinese polysilicon exposure that will have to be resourced on a schedule Washington, not the market, dictates.