The first round of President Donald Trump's punitive tariffs on China will hit the full $50 billion in goods starting August 23, the government announced Tuesday. Washington already imposed 25 per cent tariffs on $34 billion in Chinese products on July 6. But it held off on a final $16 billion as a result of concerns raised by US companies.

Although the move was expected, it cements the view that there appears to be no effort underway to defuse the dispute between the world's two largest economies that have continued to exchange threats.