Collapse · S&P 500 Index (2008)
From May to December 2008 the S&P 500 plunged 34.3% into one of history's sharpest collapses. Replay 142 daily bars, navigate 25 decision points, and receive an AI coach review, all with simulated capital for learning.
142 daily bars · 25 decision points · 2008-05 to 2008-12 · Stocks
Key facts
This window spans 202 days with a peak-to-trough drawdown of 46.4% and a 21.4% run-up.
- Max drawdown
- −46.4%
- Max run-up
- +21.4%
- Duration
- 202 days
- Largest single-day move
- +11.6%
- Bars
- 142 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 summer of 2008 found equity markets at a precarious crossroads. The S&P 500 had already surrendered a significant portion of its peak value when this scenario opens on May 28, as the subprime mortgage crisis metastasized into a full-system credit crunch. Financial institutions faced mounting pressure, credit markets seized, and the very architecture of modern finance seemed under existential threat. For anyone studying market dynamics or risk management, this period represents a masterclass in how rapidly confidence can evaporate and prices can collapse under systemic stress.
What followed over the next 142 daily bars was one of the most brutal sustained declines in market history. The index fell from 1390.84 to 913.18, a total decline of -34.3%, with maximum drawdown reaching 46.4%. Individual sessions saw moves as large as 11.6%, creating an environment where traditional risk models struggled and volatility became the dominant force. The sheer persistence of the decline—with no meaningful respite—tested every assumption about diversification and position management.
This replay embeds 25 decision points across the period, with 9 marked as critical junctures where choices between action and inaction carried amplified consequences. The scenario forces participants to confront the psychological reality of loss aversion, the danger of averaging down into collapsing positions, and the discipline required to preserve capital when historical precedent offers no comfort. Studying this era hones the ability to recognize deteriorating market structures before they cascade, to calibrate position size against tail risk, and to maintain decision-making process when emotion demands surrender.
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