KOSPI · July 28, 2026
The circuit breaker trips again
-10.84%
single-day change vs previous close
Part of a longer stretch
The AI bubble argument hits the KOSPI
near the end of it · 2026-06-22 → 2026-07-30, -38.63% over the whole period
What happened that day?
- On 28 July 2026 the KOSPI fell 10.84%
- As the drop deepened the Korea Exchange triggered a circuit breaker and halted trading for twenty minutes — the second time since June
- Samsung Electronics and SK Hynix both fell by double digits
- It started with the previous US session, where the leading chipmaker slid hard and lost its place as the most valuable company
- Competition from a Chinese memory maker was added to the pile — more supply means prices are harder to hold
- Foreign investors sold close to five trillion won net in one session
- Japan's Nikkei fell sharply the same day, its chip equipment makers riding the same wave
- From the peak the index was down 38.63%
Sources
Every figure on this page is recomputed from the original daily closing prices and checked against them at build time. The account of what happened is written from the sources listed above.