V-Lab
Coca-Cola Co/The GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
18.01%
increased by 0.08%
1 Week
18.08%
increased by 0.15%
1 Month
18.32%
increased by 0.39%
Analysis last updated: Monday, September 14, 2026 at 09:50 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
With persistence 0.994, volatility shocks have a half-life of 107 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GARCH Model
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High persistence: persistence 0.994, shock half-life ~107 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0130 | 3.72*** |
| αARCH | 0.0505 | 7.64*** |
| βGARCH | 0.9430 | 131.64*** |
0.994
Persistence107d
Half-lifeσ
GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0130 | 3.72*** |
α ARCH Response to squared shocks | 0.0505 | 7.64*** |
β GARCH Volatility persistence | 0.9430 | 131.64*** |
Persistence:
0.994
Half-life:
107 days
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