Trump targets Chinese dominance with polysilicon tariffs and price floors

The White House on Thursday imposed a series of price floors and a 15% tariff on products made from polysilicon, the raw material used in semiconductors and solar panels that is primarily produced by China. The move puts one of the tightest bottlenecks in clean-energy and chip supply chains at the center of President Donald Trump’s effort to rebuild U.S. manufacturing.

Polysilicon matters because the market is already overwhelmingly concentrated upstream. Nikkei Asia said Chinese companies hold 96% of global production of the key material for chips and solar panels, giving Beijing and Chinese producers outsized influence over pricing and availability. By targeting that input rather than only finished imports, the administration is trying to make domestic production more viable, but it is also raising the likelihood that U.S. buyers will pay more in the near term.

The policy followed a year-long Commerce Department investigation, showing the action moved through a formal trade process rather than as a one-off political gesture. Reuters had reported that the administration was weighing a price floor and tariffs on polysilicon and related products, and later said Trump was likely to reject U.S. industry requests for a quicker tariff. That suggests the White House was balancing pressure from domestic producers against the risk of pushing costs up too quickly for solar developers and other manufacturers that rely on imported material.

The administration has cast the action as part of a broader push to reduce dependence on Chinese supply chains in strategic sectors. In practice, the first beneficiaries are likely to be U.S. polysilicon producers that have struggled to match lower-cost imports. The first payers are likely to be downstream users, including solar manufacturers, utilities planning new projects, and firms tied to chip-related manufacturing that buy the material or its derivative products.

The distinction from earlier tariff-heavy trade fights is that the White House paired the tariff with minimum import prices. That approach is meant to prevent foreign suppliers from undercutting U.S. rivals with ultra-cheap exports, a tactic that can wipe out domestic capacity before factories scale. It also makes the policy more of an industrial intervention than a simple border tax, even if the immediate effect is to tighten margins for buyers.

South China Morning Post said the measures add to trade tensions ahead of Xi Jinping’s expected U.S. visit. For Washington, the wager is straightforward: use tariffs and price floors to force a reset in solar and semiconductor supply chains, and see whether higher costs now can buy more domestic capacity later.