"We will review exporters' dollar supply and demand and check whether there is any difficulty (they are facing)," a foreign exchange authority told Reuters, adding there was increased volatility in the market in recent days.
Earlier in the session, the South Korean won weakened as much as 1.20% against the dollar, hitting its lowest level since early December last year. (Reporting by Yena Park; Writing by Jihoon Lee; Editing by Tom Hogue)