The Korean won closed at 1,352.8 per U.S. dollar at 3:30 p.m. on the 30th, strengthening 3.9 won from the previous trading day’s weekly close of 1,356.7. The move was attributed to quarter-end dollar sales by export companies. Exporters commonly convert dollars into won to settle payments and secure funds at the end of each quarter, increasing dollar supply and putting downward pressure on the won-dollar exchange rate.