Corn Historical Replay: 2021-05 to 2021-08
Corn futures fell 18.3% across 64 daily bars from 2021-05-21 to 2021-08-20, with drawdowns reaching 25.2%. Replay the boom-bust day by day, face 4 critical decision points, and get an AI coach review in this simulated educational market-history scenario.
64 daily bars · 11 decision points · 2021-05 to 2021-08 · Commodities
Key facts
This window spans 91 days with a peak-to-trough drawdown of 25.2% and a 16.1% run-up.
- Max drawdown
- −25.2%
- Max run-up
- +16.1%
- Duration
- 91 days
- Largest single-day move
- −17.4%
- Bars
- 64 Daily bars
- Decision points
- 11
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 2021 found corn futures at a crossroads. After months of gains fueled by supply concerns and speculative flows, prices had reached levels that invited regulatory scrutiny. This market replay immerses you in 64 days of trading, starting May 21st, when corn held near 659.5 and the first signs of policy headwinds began forming. The stakes were clear: participants faced a market at historical extremes, where one miscalculation could mean steep losses. Four critical decision points punctuate this period, each demanding traders navigate mounting uncertainty with precision.
The numbers tell a stark story of reversal. Over those 64 daily bars, corn fell from 659.5 to 538.75—a decline of -18.3%—while maximum drawdown touched 25.2%. The volatility was punishing: single sessions moved as much as 17.4%, creating whipsaw conditions that devastated reactive traders. Those holding long positions through the peak watched gains evaporate, while others faced the challenge of timing short entries without getting caught in sharp technical bounces. The market rewarded neither stubborn bulls nor impatient shorts.
For decision training, this scenario exposes fundamental lessons about risk management and psychological resilience. The 25.2% drawdown reminds us that position sizing must account for sustained adverse moves. The 17.4% single-bar volatility shows how short-term signals become noise in volatile regimes. Most critically, the four decision points illustrate how quickly market character shifts—from trending to mean-reverting—and demand traders continuously reassess their thesis rather than anchoring to initial assumptions. This replay teaches that surviving volatile markets requires both disciplined risk controls and the mental flexibility to abandon a thesis when evidence warrants.
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