KOSPI Index Today : September 18th

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On September 18, 2026, the KOSPI index traded sharply higher in morning session, reaching around 6,850–6,860 points. This marked a gain of roughly 135–145 points, or about 2.0–2.5 percent, from the previous close of 6,715.41. The rise came as investors bought market heavyweights amid easing inflation concerns, falling oil prices, and positive overnight cues from …