Bubble · KOSPI Index (2015)
Replay 150 daily bars of the 2015 KOSPI biotech bubble, where the index posted a 10.6% maximum drawdown. Step through each authentic session, make decisions at 26 points, and receive an AI coach review in a simulated environment.
150 daily bars · 26 decision points · 2015-08 to 2016-03 · Stocks
Key facts
This window spans 224 days with a peak-to-trough drawdown of 10.6% and a 12.2% run-up.
- Max drawdown
- −10.6%
- Max run-up
- +12.2%
- Duration
- 224 days
- Largest single-day move
- +3.0%
- Bars
- 150 Daily bars
- Decision points
- 26
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
In mid‑August 2015 the KOSPI entered a biotech‑themed surge that would dominate trading through early 2016. The replay spans 150 daily bars from 2015‑08‑12 to 2016‑03‑23, capturing a period when speculative fervor around biological‑pharma concepts drove abnormal price behavior on the Seoul exchange. With a 10.6 % maximum drawdown lurking beneath the surface, the scenario asks participants to navigate a bubble that could reverse at any moment, making the stakes around capital preservation and disciplined entry especially high.
Over the full span the index moved from a close of 1975.47 to 1995.12, a modest 1.0 % gain that masks a turbulent interior. The largest single‑day swing reached 3.0 %, while the worst peak‑to‑trough decline hit 10.6 %, illustrating how a seemingly flat overall return can be accompanied by sharp volatility. Traders were presented with 26 decision points, nine of which were flagged as critical, demanding timely responses to sudden momentum shifts and policy‑driven news.
The episode is a textbook case for training decision‑making under bubble dynamics. It forces learners to confront the psychological lure of chasing rapid gains, the necessity of strict position sizing to survive a 10 % drawdown, and the value of a clear process for exiting when price action deteriorates. Practicing at each of the 26 points—especially the nine critical ones—helps build the emotional resilience needed to resist herd behavior and stick to risk‑management rules when the market swings by 3 % in a single session.