The $USD Index(USDindex.FOREX)$ has broken through the 98 mark, marking the first time since March 2022, with a drop of over 1% within the day.So far in 2025, the USD index has fallen by more than 9%, making it the worst start to a year since 1995.To put it simply, the USD index breaking through the 98 mark is mainly due to the following reasons:Trump's "Troublemaking"Trump has recently started "speaking out of turn" again, threatening to fire the Federal Reserve chairman and demanding that the Fed cut interest rates. This kind of "reckless talk" has made investors feel that U.S. economic policies are unstable. They are getting nervous and quickly selling off the dollar, which has led to the decline of the USD index.Trade Policy "Adding