Ce lundi, le dollar australien, l' euro, le rouble russe et le rand sud-africain ont chuté, tandis que le yuan hit a high of over a week.

The Australian dollar slid Monday from its highest levels in eight months after US President Donald Trump sent tariff letters to the EU and Mexico, while the kiwi struggled to stay above 60 cents. The Australian dollar fell 0.1% to $0.6566, after reaching an eight-month high of $0.6595 on Friday. It registered a slight gain of 0.3% last week, an impressive result considering the overall rebound in the US dollar. The New Zealand dollar fell by 0.4% to $0.5985, after losing 0.7% last week to a low of $0.5978. It is now encountering resistance at 60 cents and is some distance away from its nine-month peak of $0.6120 reached two weeks ago

The euro fell to its lowest level in three weeks early on Monday, while the Mexican peso was also under pressure after US President Donald Trump threatened to impose a 30% tariff on imports from two of the United States' biggest trading partners in ; starting on August 1.

The South African rand was down in early trading on Monday as investors pondered the latest tariff threats from US President Donald Trump. At 06:27 GMT, the rand traded at 17.96 against the dollar, about 0.1% lower than Friday's close. The Rand and South African stocks are falling due to lower commodity prices

The Russian ruble weakened against the US dollar ahead of US President Donald Trump's expected “major statement” on Russia, with analysts expecting more volatility in the foreign exchange market. At 08:00 GMT, the ruble lost 0.6% of its value, to 78.45 per US dollar, according to LSEG data based on over-the-counter quotes. The Russian currency has risen by around 45% against the dollar since the start of the year. The Russian ruble weakens against the US dollar for the first time since July 3

The spot yuan opened at 7.1606 for one dollar and was last traded at 7.1693 for one dollar at 02:20 GMT, 9 pips firmer than the close of the previous session and 0.28% weaker than the midpoint. The Chinese yuan is rising thanks to stronger forecasts from the People's Bank of China (PBOC), despite the rise in the dollar

The offshore yuan traded at 7.1711 yuan to the dollar, up about 0.06% in Asian trade.