The dollar-won exchange rate, KOSPI and Kosdaq indexes are displayed on a screen at the dealing room of Hana Bank in Seoul, Tuesday.
The KOSPI closed at 8,203.84, down 910.71 points, or 9.99 percent, from the previous session, while the Kosdaq ended at 891.52, losing 76.88 points, or 7.94 percent.
Yonhap Korean stocks suffered a steep decline Tuesday as foreign investors offloaded shares across the board, dragging the benchmark KOSPI down by nearly 10 percent and triggering market stabilization measures.
The KOSPI, which closed at a record high of 9,114.55 in the previous session, opened at 9,083.54, down 31.01 points, or 0.34 percent.
After briefly moving into positive territory, the index reversed course and extended its losses throughout the session, finishing at 8,203.84, down 910.71 points, or 9.99 percent.
