V-Lab
Coca-Cola Co/The Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
14.84%
decreased by 0.31%
1 Week
14.96%
decreased by 0.19%
1 Month
15.34%
increased by 0.19%
Analysis last updated: Saturday, September 12, 2026 at 12:15 AM 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
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 17 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
Time-varying baseline: volatility reverts to a slowly-shifting spline trend
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.3406 | 7.44*** |
| αARCH | 0.0674 | 6.35*** |
| βGARCH | 0.8934 | 56.00*** |
Spline Coefficients
K=8
| γ1 | 0.0226 | 0.80 |
| γ2 | -0.0019 | -0.04 |
| γ3 | -0.0952 | -3.47*** |
| γ4 | 0.1505 | 5.86*** |
| γ5 | -0.1206 | -4.28*** |
| γ6 | 0.0852 | 2.46** |
| γ7 | -0.0714 | -1.64 |
| γ8 | 0.0405 | 1.17 |
0.961
Persistence17d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.3406 | 7.44*** |
α ARCH Response to squared shocks | 0.0674 | 6.35*** |
β GARCH Volatility persistence | 0.8934 | 56.00*** |
Spline Coefficients
K=8
| γ1 | 0.0226 | 0.80 |
| γ2 | -0.0019 | -0.04 |
| γ3 | -0.0952 | -3.47*** |
| γ4 | 0.1505 | 5.86*** |
| γ5 | -0.1206 | -4.28*** |
| γ6 | 0.0852 | 2.46** |
| γ7 | -0.0714 | -1.64 |
| γ8 | 0.0405 | 1.17 |
Persistence:
0.961
Half-life:
17 days
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