KOSPI · May 21, 2026
A big day after a big fall
+8.42%
single-day change vs previous close
What happened that day?
- On 21 May 2026 the KOSPI rose 8.42%
- The index had fallen 29.92% from its peak in this stretch, on the argument over AI-related prices
- A market that has fallen a long way bounces a long way — especially one where a few companies set the level
- Two chip companies carry enormous weight in the KOSPI. When they rise, the index rises with them
- No single trigger can be pinned to this day
- This was not the bottom either. A far larger slide began at the end of June
- That one took the index more than thirty-eight percent below its peak
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.