Photo : YONHAP News
The won-dollar exchange rate broke one-thousand-500 in intraday trading after global oil prices surpassed 100 U.S. dollars per barrel, then slid back.
The currency opened Monday at one-thousand-501 won per dollar after closing at 1,493.7 the previous day.
It marks the first time since March 12, 2009, during the global financial crisis that the won has strengthened past one-thousand-500 against the dollar.
The exchange rate briefly reached one-thousand-505-point-eight won during overnight trading on March 4 and breached one-thousand-500 again on Saturday.
However, the rate fell back below the mark early Monday amid growing expectations of official intervention and dollar selling by exporters.
Global oil prices slid back under 100 dollars per barrel as Asian markets opened.
The dollar, meanwhile, continued to rally against other major currencies, with the ICE U.S. Dollar Index reaching 100-point-five on Saturday for the first time since May 2025 before easing slightly to 100-point-21.