V-Lab
Global X Nasdaq-100 Cove ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
23.59%
decreased by 0.11%
1 Week
23.54%
decreased by 0.16%
1 Month
23.34%
decreased by 0.36%
Analysis last updated: Saturday, July 25, 2026 at 09:13 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
With persistence 0.990, volatility shocks have a half-life of 72 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 5.75 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.6884 | 4.94*** |
α ARCH Response to squared shocks | 0.0796 | 33.61*** |
β GARCH Volatility persistence | 0.9905 | 539.18*** |
ν DF Student-t tail thickness | 5.7474 | 7.77*** |
Persistence:
0.990
Half-life:
72 days
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