The South Korean won weakened against the U.S. dollar on Monday, trading at 1,429.8 won per dollar by mid-afternoon.
The move reflects persistent pressure from overseas investors, who remained net sellers of local equities, according to Yonhap News Agency.
The currency's decline marks a continuation of the pressure that has plagued the won in recent weeks.
The won has depreciated nearly 6% against the U.S. dollar over the past month, driven by sustained selling of local equities by foreign investors.
This selling pressure has kept the currency near its weakest levels in recent history.
The depreciation trend underscores the vulnerability of emerging market currencies to shifts in global risk sentiment and foreign capital flows.