V-Lab
-1x Short VIX Futures ETF Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
52.55%
increased by 8.55%
1 Week
51.22%
increased by 7.22%
1 Month
49.21%
increased by 5.21%
Analysis last updated: Friday, September 11, 2026 at 10:21 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 29, 2022 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 4 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 | 1.3161 | 3.06*** |
| αARCH | 0.2205 | 3.82*** |
| βGARCH | 0.6009 | 8.06*** |
Spline Coefficients
K=4
| γ1 | 0.4526 | 0.54 |
| γ2 | 0.2186 | 0.18 |
| γ3 | -1.7283 | -1.95* |
| γ4 | 1.5743 | 2.38** |
0.821
Persistence4d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.3161 | 3.06*** |
α ARCH Response to squared shocks | 0.2205 | 3.82*** |
β GARCH Volatility persistence | 0.6009 | 8.06*** |
Spline Coefficients
K=4
| γ1 | 0.4526 | 0.54 |
| γ2 | 0.2186 | 0.18 |
| γ3 | -1.7283 | -1.95* |
| γ4 | 1.5743 | 2.38** |
Persistence:
0.821
Half-life:
4 days
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