KOSPI · October 22, 2026

Four months in which the summer low was not the low

-39.29%

peak-to-trough, the whole slide

82 trading days · 2026-06-22 → 2026-10-22

still below that peak today

What happened that day?

From the record high of June 22, 2026 to the low of October 22, the KOSPI fell 39.29% — 82 trading days
The question never changed over those four months: when does the money going into AI build-outs come back as profit? The spending was certain, the return was not
A large share of the KOSPI sits in two chip names. Every time the question resurfaced, the index moved with them
It looked like the bottom had come in summer. On July 28 the one-day fall ran into double digits and trading was halted; the July 30 close was that leg's low
October broke through it. Six of the month's first fifteen sessions moved more than three percent
October added an American layer — warnings over the debt behind data centres, and a hotter-than-expected US inflation print that narrowed the room for rate cuts
On October 22 the index fell 3.52% to 5,533.77, the lowest close since early April. The Bank of Korea left its policy rate unchanged the same day
The episode has yet to regain the prior 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 put together from the public record; where a specific source was consulted it is listed above.