WhyItDropped

Nikkei 225 · June 15, 2026

The war ended and oil fell with it

+4.99%

single-day change vs previous close

What happened that day?

  • On 15 June 2026 the Nikkei 225 rose 4.99% to close at 69,317.50 — its first close above 69,000
  • Over the weekend the US and Iran announced a deal ending their war
  • Crude futures fell sharply on the news
  • Japan imports almost all of its energy. Cheaper oil means lower costs for companies and an easier economy
  • So it was not only chips. Construction and plant engineering, which had lagged, moved up too
  • In points it was the second-largest closing gain on record
  • The slide began soon after this high, though. The index would fall 15.11% from here

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.