New Zealand experienced the most severe national stock-market loss during the October 1987 Black Monday episode.
New Zealand’s share market fell dramatically over the crash period, with the decline from its peak reaching roughly 60% by early 1988. That loss was substantially larger than the single-day falls recorded in many other developed markets. The crash hit New Zealand during a period of financial liberalization and economic adjustment.
Black Monday was a global event rather than one confined to the United States. Hong Kong suffered a particularly severe collapse, while markets in Australia, Canada, the United Kingdom, and elsewhere also fell sharply. Differences in trading hours meant that some markets reacted before others.
The scale of New Zealand’s decline is sometimes overlooked because the U.S. Dow’s 22.6% one-day fall receives most of the attention. New Zealand’s experience also reflected domestic vulnerabilities, including high interest rates, financial-sector changes, and an economy undergoing major policy reform.