V-Lab
Global X Nasdaq-100 Cove ETF Zero Slope Spline-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
20.65%
decreased by 0.25%
1 Week
20.58%
decreased by 0.32%
1 Month
20.33%
decreased by 0.57%
Analysis last updated: Saturday, July 25, 2026 at 09:12 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 14, 2011 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 35 trading days.
τ
Zero Slope Spline-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.8924 | 5.17*** |
α ARCH Response to squared shocks | 0.0886 | 7.19*** |
β GARCH Volatility persistence | 0.8920 | 69.31*** |
Spline Coefficients
K=1
| γ1 | -0.0013 | -0.91 |
Persistence:
0.981
Half-life:
35 days
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