The yen, for its part, has been steadily weakening as the prospects dim for a U.S.-Japan trade deal. The dollar was up 0.6% on Friday at 147.12 yen and is headed for a weekly gain of 1.7%, the biggest this year. On the crosses, the yen is down for a seventh straight week on the euro and hit a five-month low on the Australian dollar .

This week, the president began sending letters to U.S. trade partners outlining what their proposed tariff rates will be.

Kazakhstan, whose close ties with Russia and China have made it a significant regional player in Central Asia, has said it is ready to reach a compromise with the Trump administration over tariffs due to take effect next month.

Brazil has logistical and commercial flexibility to preserve the competitiveness of its oil on the international market if the 50% tariff announced by U.S. President Donald Trump on Wednesday comes into effect on August 1,

The president has published just 22 letters, many to minor trading partners like Brunei, Moldova and Sri Lanka.