KOSPI closes 3.1 percent higher as SK hynix leads AI rebound
Published on 10/27/2026 at 13:05 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWSAI optimism lifts chip shares
- KOSPI closed at 5,638 points on October 27, up 169 points or 3.1 percent.
- AI optimism and lower oil prices lifted risk appetite after Anthropic filed for an IPO.
- SK Square was the strongest named gainer, rising 7.7 percent on semiconductor strength.
- SK hynix will release third-quarter results before 9:00 a.m. KST on October 28.
The KOSPI closed at 5,638 points on October 27, up 169 points or 3.1 percent. Renewed optimism over artificial intelligence and lower oil prices lifted risk appetite, Yonhap News Agency reported.
SK hynix gained 5.2 percent and Samsung Electronics rose 4.2 percent. SK Square jumped 7.7 percent, while Samsung Biologics fell 5.4 percent, MoneyToday reported.
Why did the KOSPI rebound on October 27?
Anthropic's planned initial public offering revived enthusiasm for artificial intelligence shares. The KOSPI also tracked gains on Wall Street, where the Dow Jones rose 0.28 percent, the S&P 500 gained 0.7 percent and the Nasdaq Composite advanced 0.82 percent, Yonhap News Agency reported.
Lower oil prices added to the positive tone as reports pointed to mediation efforts involving Iran and the United States. Foreign investors and institutions led the rebound, while the exchange activated a buy-side sidecar at 10:13 a.m. KST after the early surge.
KOSPI chip shares lead the rebound
Semiconductors drove the advance. Samsung Electronics closed at KRW 222,000, while SK hynix finished at KRW 1.341 million. Samsung Electro-Mechanics rose 7.4 percent, and pharmaceuticals weakened after Samsung Biologics fell 5.4 percent, Seoul Economic Daily reported.
Trading volume reached 183.13 million shares worth KRW 15.29 trillion. Advancers outnumbered decliners 593 to 274, according to Yonhap News Agency.
What comes next for the KOSPI
- October 28, 2026, before 9:00 a.m. KST: SK hynix releases third-quarter results; its conference call starts at 9:00 a.m. KST, SK hynix says.
- October 29, 2026, 10:00 a.m. KST: Samsung Electronics is scheduled to release its final third-quarter results, Seoul Economic Daily reported.
KOSPI price data for October 27, 2026
The KOSPI closed at 5,638 points on October 27, 2026, up 169 points or 3.1 percent from the previous close of 5,469 points, according to Barrons. It opened at 5,659 points and traded between 5,613 points and 5,738 points.
KOSPI by the numbers on October 27, 2026
- Index: KOSPI
- Home exchange: Korea Exchange, South Korea
- Close on October 27, 2026: 5,638 points
- Change versus previous close of October 26, 2026: up 169 points (up 3.1 percent)
- Previous close: 5,469 points
- Open: 5,659 points
- Day high / day low: 5,738 points / 5,613 points
- Top gainer: SK Square up 7.7 percent
- Top loser: Samsung Biologics down 5.4 percent
- Next scheduled event: October 28, 2026, before 9:00 a.m. KST: SK hynix third-quarter results
