The KOSPI index closed at 9,063.84 on June 18, 2026, after rising 199.6 points, with an intraday high of 9,106.07 and first crossing the 9,000-point threshold that day. Market capitalization exceeded 7,300 trillion won, driven by gains in Samsung Electronics and foreign inflows, alongside an interim U.S.-Iran peace agreement. Prior milestones include crossing 3,000 points in 2025 and successive thresholds through 7,000 points in May 2026.