V-Lab
CBOT Corn GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 31st, 2026
1 Day
26.16%
decreased by 0.93%
1 Week
26.32%
decreased by 0.77%
1 Month
26.88%
decreased by 0.21%
Analysis last updated: Sunday, August 30, 2026 at 04:19 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 17, 2000 to Aug 28, 2026Model Insight
Volatility shocks decay with a half-life of 46 trading days, meaning a shock loses half its impact after approximately 46 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0574 | 4.67*** |
α ARCH Response to squared shocks | 0.0618 | 4.38*** |
β GARCH Volatility persistence | 0.9107 | 93.75*** |
γ leverage Additional response to negative shocks | 0.0251 | 0.86 |
Persistence:
0.985
Half-life:
46 days
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