The South Korean currency fell below 1,390 won against the dollar on Wednesday for the first time in more than 13 years.
The local currency was trading at 1,394.7 won against the US dollar, Yonhap News Agency reported, down 21.1 won from the close of the previous session.
This is the first time that the South Korean currency has fallen to the level of 1,390 won against the dollar since March 31, 2009.