Nikkei 225 · October 15, 2026

Chip stocks drag Tokyo down

-4.90%

single-day change vs previous close

What happened that day?

October 15, 2026 — the Nikkei 225 closed down 4.90% at 64,425.95. No single cause for the day could be pinned down
The fall was 3,318 points — the third largest one-day point drop on record, behind August 2024 and October 1987
In percentage terms it was the second worst day of the year, after March 9. It also capped six straight declines
US September consumer prices, published the night before, came in hotter than expected — less room for rate cuts, and Asia took the hit
Warnings over the debt behind AI build-outs had been piling up. Reports that a US cloud provider's funding terms had worsened landed during the session
The damage was concentrated in chip-equipment names — heavyweights in the index, so the index moved with them
Korea's KOSPI fell far enough the same day to trigger a circuit breaker. Asian chip names moved together
The close was the lowest since mid-September. The next session bounced

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.