The KOSPI value is displayed on an electronic board at the dealing room of Hana Bank in Seoul, Friday.
The benchmark index closed at 8,123.62, up 359.67 points, or 4.63 percent, from the previous session.
Yonhap Foreign investors returned to net buying in the KOSPI market on Friday for the first time in 25 trading days, fueling a sharp rally that briefly sent the benchmark index soaring past the 8,400 mark during intraday trading.
KOSPI opened 6.44 percent higher at 8,263.85, up 499.90 points from the previous session, and briefly surged as much as 8.5 percent to hit an intraday high of 8,424.13 before paring gains to close at 8,123.62, up 359.67 points, or 4.63 percent, on the day.
The rapid advance in KOSPI futures prompted the Korea Exchange to activate a sidecar, temporarily halting program buy orders early in the trading session.
