KOSPI · September 10, 2025
Five months past the tariff shock
+44.51%
trough back to the old high
104 trading days · 2025-04-09 → 2025-09-10
What happened that day?
- From the low on 9 April 2025 to 10 September, the KOSPI rose 44.51% over 104 trading days
- The starting point was the day the US said it would pause its reciprocal tariffs. The plunge of the preceding days was simply undone
- Korean shares are unusually sensitive to tariffs. Exports make up a large share of earnings, and chips and cars in particular depend on the US market
- Demand for memory used in artificial intelligence arrived on top of that. The makers of the expensive high-performance memory are concentrated in Korea
- A small number of large companies did the lifting. That is why the index rose while it did not feel that way
- The KOSPI passed the three thousand level in this stretch, after being stuck below it for years
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.