Crash · S&P 500 Index (2018)
Replay 144 days of S&P 500 volatility, where the index swung through a 10.2% drawdown before recovering 8.3%. Step through each bar, face 25 decision points, and receive AI coach feedback in a simulated training environment.
144 daily bars · 25 decision points · 2017-09 to 2018-04 · Stocks
Key facts
This window spans 209 days with a peak-to-trough drawdown of 10.2% and a 15.1% run-up.
- Max drawdown
- −10.2%
- Max run-up
- +15.1%
- Duration
- 209 days
- Largest single-day move
- −4.1%
- 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 S&P 500 entered the autumn of 2017 near 2500.6, a level that reflected years of steady gains across the 2010s. The period from 2017-09-21 to 2018-04-18 spans 144 trading days and captures a pivotal chapter in post-crisis market history. Investors and analysts watching this era faced a fundamental question: how does one navigate an apparently strong market when the underlying volatility structure begins to shift? This was not merely a test of conviction in equities—it was a test of risk management discipline.
Over the 144-bar replay, the index experienced a maximum drawdown of 10.2%, a move large enough to test even patient portfolios. The largest single-bar swing of 4.1% underscores the kind of intraday panic or euphoria that can force hasty decisions. By the end of the period on 2018-04-18, the close had recovered to 2708.64, translating to an 8.3% net gain from the starting point. The path between those two points was anything but straight, creating repeated inflection points throughout the journey.
This scenario places trainees at 25 decision points, with 9 flagged as critical moments where positioning could diverge sharply from the eventual outcome. The educational value lies not in predicting the 8.3% recovery, but in understanding how one manages the journey through a 10.2% drawdown. Process discipline, emotional equilibrium under 4.1% single-bar moves, and the willingness to stick to a sound risk framework when confidence wavers—these are the skills this historical window is designed to sharpen.