V-Lab
Polaris Group Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
40.95%
decreased by 1.84%
1 Week
44.41%
increased by 1.62%
1 Month
48.81%
increased by 6.02%
Analysis last updated: Sunday, July 26, 2026 at 05:50 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 15, 2016 to Jul 24, 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 3 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.2460 | 4.18*** |
α ARCH Response to squared shocks | 0.1835 | 5.25*** |
β GARCH Volatility persistence | 0.6254 | 10.07*** |
Spline Coefficients
K=10
| γ1 | 3.1824 | 4.26*** |
| γ2 | -5.5845 | -4.13*** |
| γ3 | 4.2961 | 2.73*** |
| γ4 | -2.8415 | -2.20** |
| γ5 | 0.7475 | 0.82 |
| γ6 | 0.5877 | 0.85 |
| γ7 | -0.9404 | -1.21 |
| γ8 | 1.3426 | 1.37 |
| γ9 | -1.0211 | -1.19 |
| γ10 | 0.1534 | 0.30 |
Persistence:
0.809
Half-life:
3 days
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