The dollar rose to its highest level in more than a week, extending gains as President Donald Trump started to unveil his proposals for US trade tariffs.

The greenback weakened 10.7% in the first six months of the year compared to a basket of currencies from major trading partners – the worst drop since 1973 when President Nixon stopped tying the dollar to the price of gold.

The dollar firmed against other major currencies on Monday, after remarks from U.S. officials offered little clarity on the outlook for tariffs, days ahead of a crucial deadline. Most U.S. trade partners face the prospect of steeper duties at the end of the 90-day moratorium on U.