V-Lab
Coca-Cola Co/The Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
18.35%
decreased by 0.52%
1 Week
18.22%
decreased by 0.65%
1 Month
17.82%
decreased by 1.05%
Analysis last updated: Friday, August 21, 2026 at 10:52 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 18 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.3389 | 7.41*** |
α ARCH Response to squared shocks | 0.0669 | 6.33*** |
β GARCH Volatility persistence | 0.8945 | 56.26*** |
Spline Coefficients
K=8
| γ1 | 0.0223 | 0.78 |
| γ2 | -0.0009 | -0.02 |
| γ3 | -0.0965 | -3.49*** |
| γ4 | 0.1513 | 5.82*** |
| γ5 | -0.1206 | -4.20*** |
| γ6 | 0.0845 | 2.39** |
| γ7 | -0.0697 | -1.58 |
| γ8 | 0.0387 | 1.12 |
Persistence:
0.961
Half-life:
18 days
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