Bubble · KOSPI Index (2000)
Feel the Internet bubble unwind as the KOSPI index falls 20.0% from 819.52 to 655.93 between October 1999 and May 2000. You replay each market day, face 25 decision points with 9 critical ones, and receive an AI coach review of your choices in this simulated, educational environment.
146 daily bars · 25 decision points · 1999-10 to 2000-05 · Stocks
Key facts
This window spans 220 days with a peak-to-trough drawdown of 38.1% and a 33.5% run-up.
- Max drawdown
- −38.1%
- Max run-up
- +33.5%
- Duration
- 220 days
- Largest single-day move
- −11.6%
- Bars
- 146 Daily bars
- Decision points
- 25
Every figure above is computed programmatically from this replay’s own candle series — no editorial input, no LLM. Methodology: Methodology
The market advances day by day. You only see candles up to the current day — as if you were really there.
At key decision points choose Buy / Trim / Exit / Hold. Each decision advances the timeline by one day.
After settlement you get a six-dimension score and an AI coach review. Your result enters the scenario leaderboard.
Event Replay
What happened — and what it teaches
The Korean stock market entered the final chapter of the global Internet bubble in late 1999, with the KOSPI index reflecting the speculative excesses of the era. Between October 1999 and May 2000, investors faced a critical test as the mania that had driven valuations to unsustainable heights began to unravel. This 146-day period captures the tension between euphoric momentum and the harsh reality of mean reversion.
The numbers tell a stark story: the KOSPI fell 20.0% from 819.52 to 655.93, with a maximum drawdown of 38.1% and a largest single-day move of 11.6%. Participants navigating this replay encountered 25 decision points, of which 9 were critical moments demanding decisive action or restraint. The persistent downward pressure tested every assumption about risk management and position sizing.
This scenario sharpens decision-making under stress, revealing how cognitive biases amplify during extended declines. Traders must practice cutting losses before they compound, avoiding the trap of averaging down on deteriorating positions. The volatility spikes, including that 11.6% single-day swing, remind us that markets can move violently against you before finding a bottom. Successfully replaying this episode builds the emotional discipline required to survive periods when the crowd turns bearish and the exit doors grow narrow.