Taiwan’s forgotten bubble

Taiwan’s 1986–1990 stock market boom serves as a critical case study for distinguishing between genuine economic transformation and speculative excess. While the TAIX rose twelve-fold, driven by real industrial advancements in semiconductors and electronics, the rally was simultaneously fueled by massive domestic liquidity resulting from currency intervention and strict capital controls. As retail participation surged and speculative investment companies proliferated, the market became increasingly detached from fundamentals, eventually losing 80% of its value following aggressive monetary tightening. This historical cycle highlights that while industrial progress can sustain long-term growth, extreme valuations, excessive leverage, and a market’s failure to recover from standard corrections signal a bubble’s final stage. Applying this framework to South Korea today requires monitoring the interplay between monetary policy, margin credit, and the resilience of the broader market against significant volatility.