The won-dollar exchange rate against the U.S. dollar closed weekly transaction (9 a.m.–3:30 p.m.) at 1,440 won on the 23rd. It fell 6.6 won from the previous trading day.
That day in the Seoul foreign exchange market, the won-dollar exchange rate began transaction at 1,443 won, down 3.6 won from the previous trading day. Ahead of the weekly transaction (9 a.m.–3:30 p.m.) close, the decline deepened, dropping by nearly 7 won from the previous session's closing price.
It is seen as the U.S. dollar weakening after the U.S. Supreme Court ruled over the weekend that the Donald Trump administration's reciprocal tariff policy was unlawful. On the 20th (local time), the U.S. Supreme Court ruled invalid the reciprocal tariffs based on the International Emergency Economic Powers Act (IEEPA).
In response, U.S. President Donald Trump has signaled he will impose a 15% global tariff under Section 122 of the Trade Act. Section 122 of the Trade Act is a provision allowing the president to impose an emergency tariff of up to 15% for 150 days to respond to a serious balance of payments deficit or a decline in the dollar's value.
Meanwhile, the dollar index, which measures the dollar's value against six major currencies, was 97.411, down 0.339 from the previous day.