Coca-Cola Co/The AGARCH Volatility Analysis
Volatility prediction for Monday, November 2nd, 2026
1 Day
20.23%
decreased by 0.53%
1 Week
20.30%
decreased by 0.46%
1 Month
20.55%
decreased by 0.21%
Analysis last updated: Friday, October 30, 2026 at 10:21 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 30, 2026Model Insight
With persistence 0.992, volatility shocks have a half-life of 82 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Asymmetry: negative returns raise volatility more
σ
AGARCH Model
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High persistence: persistence 0.992, shock half-life ~82 daysAsymmetry: negative returns raise volatility more
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0075 | 1.52 |
| αARCH | 0.0570 | 7.72*** |
| βGARCH | 0.9346 | 113.48*** |
| γleverage | 0.4506 | 3.90*** |
0.992
Persistence82d
Half-lifeσ
AGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0075 | 1.52 |
α ARCH Response to squared shocks | 0.0570 | 7.72*** |
β GARCH Volatility persistence | 0.9346 | 113.48*** |
γ leverage Additional response to negative shocks | 0.4506 | 3.90*** |
Persistence:
0.992
Half-life:
82 days
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