V-Lab
General Mills Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
28.79%
decreased by 0.43%
1 Week
28.65%
decreased by 0.57%
1 Month
28.14%
decreased by 1.08%
Analysis last updated: Friday, September 18, 2026 at 11:29 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
Volatility shocks decay with a half-life of 68 trading days, meaning a shock loses half its impact after approximately 68 days.
σ
GJR-GARCH Model
Tap to view equation
Shock decay: Shocks decay with a 68-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0175 | 3.98*** |
| αARCH | 0.0275 | 3.68*** |
| βGARCH | 0.9542 | 154.70*** |
| γleverage | 0.0164 | 1.27 |
0.990
Persistence68d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0175 | 3.98*** |
α ARCH Response to squared shocks | 0.0275 | 3.68*** |
β GARCH Volatility persistence | 0.9542 | 154.70*** |
γ leverage Additional response to negative shocks | 0.0164 | 1.27 |
Persistence:
0.990
Half-life:
68 days
Other General Mills Inc Analyses
Other GJR-GARCH Analyses on Equities