V-Lab
Global X Nasdaq-100 Cove ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
17.38%
decreased by 1.14%
1 Week
17.43%
decreased by 1.09%
1 Month
17.65%
decreased by 0.87%
Analysis last updated: Saturday, August 22, 2026 at 01:53 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 14, 2011 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 63 trading days, meaning a shock loses half its impact after approximately 63 days. Returns follow a Student-t distribution with v = 5.68 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 | 1.5624 | 5.05*** |
α ARCH Response to squared shocks | 0.0799 | 31.57*** |
β GARCH Volatility persistence | 0.9890 | 471.18*** |
ν DF Student-t tail thickness | 5.6822 | 7.47*** |
Persistence:
0.989
Half-life:
63 days
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