The U.S. government is extending its review of the alleged subsidization of car tire exports from Vietnam. While that will extend supply chain uncertainties for U.S. tire buyers it is needed as this is one of the first cases that incorporates alleged currency manipulation in its assessments. That tool may be used in the future in particular in tariff cases against China, which President Trump has previously declared – against Treasury Department evidence – to be a currency manipulator. While imports from Vietnam only represented 7.5% of U.S. car tire imports in the 12 months to June 30 t...