WhyItDropped

Nikkei 225 · September 5, 1990

After rates hit six percent

-3.33%

single-day change vs previous close

Part of a longer stretch

The bubble's first leg down

near the end of it · 1989-12-29 → 1990-10-01, -48.04% over the whole period

What happened that day?

  • On 5 September 1990 the Nikkei 225 fell 3.33%
  • Rates had gone to six percent the week before
  • At the same time the Gulf crisis kept pushing oil up. Both worked the same way
  • That combination was especially bad for Japan: money tightening while costs rose
  • No single trigger can be pinned to this day
  • In this stretch the index was 39.08% below its peak, and the low came on 1 October

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.