Pandemic · Nikkei 225 Index (2020)
Replay the Nikkei 225 from September 2019 to April 2020, an authentic 144-day window where the index fell 10.5% amid pandemic fears. You make 25 day-by-day decision points, with AI coach feedback reviewing each choice. Simulated capital, educational training only.
144 daily bars · 25 decision points · 2019-09 to 2020-04 · Stocks
Key facts
This window spans 220 days with a peak-to-trough drawdown of 31.3% and a 20.2% run-up.
- Max drawdown
- −31.3%
- Max run-up
- +20.2%
- Duration
- 220 days
- Largest single-day move
- +8.0%
- Bars
- 144 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 Nikkei 225 entered the autumn of 2019 near historic highs, with investors navigating a complex global backdrop. What followed was a 144-day window from September 2019 to April 2020 that would test every trader's assumptions about risk and resilience. As whispers of a new respiratory illness emerged from Asia, the index that had seemed immune to geopolitical tensions began a journey that would reveal the fragility hidden beneath apparent stability. The period presented 25 decision points, 9 of them critical, demanding that participants make choices in real-time as the situation evolved.
By the close of April 2020, the Nikkei 225 had fallen 10.5% from its September level, closing at 19669.12. Yet this headline figure masks a far more turbulent story: the index experienced a maximum drawdown of 31.3% at its worst point, with the largest single-day move reaching 8.0%. Volatility was not a temporary disruption but a defining characteristic of this era, punishing both passive holders and hasty allocators alike. The decline was not linear; it unfolded in waves of panic, temporary relief, and renewed uncertainty that would have challenged even experienced market participants.
This replay teaches that process matters more than prediction. The pandemic's economic impact was genuinely unknowable in real-time, yet the index's behavior—the sharp drawdowns, the brief but violent reversals—offered repeatable lessons in position sizing and emotional discipline. Participants learn that risk management is not about avoiding losses but surviving them with capital intact. The 9 critical decision points scattered across this window force reflection on how conviction, fear, and information overload interact to shape choices under pressure. Understanding these psychological patterns is perhaps the most valuable outcome this historical episode offers.