V-Lab
Roundhill Nasdaq-100 0DTE Covered Call ETF Strategy ETF Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Thursday, September 10th, 2026
1 Day
14.31%
decreased by 0.27%
1 Week
15.16%
increased by 0.58%
1 Month
17.09%
increased by 2.51%
Analysis last updated: Wednesday, September 9, 2026 at 09:10 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 6, 2024 to Sep 4, 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 9 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 | 0.9027 | 3.97*** |
| αARCH | 0.1052 | 2.85*** |
| βGARCH | 0.8175 | 13.36*** |
Spline Coefficients
K=1
| γ1 | -0.0236 | -0.29 |
0.923
Persistence9d
Half-lifeτ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9027 | 3.97*** |
α ARCH Response to squared shocks | 0.1052 | 2.85*** |
β GARCH Volatility persistence | 0.8175 | 13.36*** |
Spline Coefficients
K=1
| γ1 | -0.0236 | -0.29 |
Persistence:
0.923
Half-life:
9 days
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