Korea's KOSPI Crashes 5%, Japan's Nikkei Falls 4% as Asia Markets Face Worst Session of 2026

The Quick Take

• South Korea's KOSPI crashed 5.23% to 7,733 and Japan's Nikkei fell 4% (2,473 points) to 64,115 on June 8
• Iran-Israel tensions, strong US jobs data, and AI stock selloff combined to trigger the worst Asian session of 2026
• Indian markets fared better comparatively, falling about 1% as India's lower AI-trade exposure provided relative insulation

Asia's equity markets experienced their worst trading session of 2026 on June 8, with South Korea's KOSPI falling 5.23% to 7,733 and Japan's Nikkei 225 shedding 4% — equivalent to 2,473 points — to settle at 64,115, according to Business Today. The simultaneous collapse reflected a convergence of factors: escalating Iran-Israel military exchanges that drove oil prices higher, a strong US May jobs report that eliminated near-term rate-cut hopes, and a sharp correction in AI and technology stocks on the Nasdaq that transmitted directly to Asia's semiconductor and tech-heavy indices.

India's relative outperformance — falling approximately 1% compared to Korea's 5% and Japan's 4% — is being read by analysts as evidence of India's structural advantage as a 'non-AI trade' in the current cycle. The $12 trillion AI-driven global equity rally of 2026 concentrated in semiconductor, cloud infrastructure, and AI platform companies that are heavily weighted in Korean and Japanese indices but represent a smaller share of India's Sensex and Nifty. This sector composition difference provided India with a meaningful buffer during the AI valuation unwind.

The forward risk for Asian markets is whether the Iran-Israel conflict escalation continues or stabilises over the coming days. A de-escalation would quickly restore risk appetite and reverse the technical selling that circuit breakers and systematic strategies amplified on Monday. But if oil prices hold above $90 per barrel for more than 2-3 weeks, the growth forecast downgrades for oil-importing Asian economies — Japan, Korea, India, and Thailand — will become the second-order catalyst for continued selling. Watch the KOSPI open on Tuesday for signals of institutional stabilisation buying.

Synthesized from 1 source.