V-Lab
Global X S&P 500 Christin VL GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
12.67%
decreased by 0.28%
1 Week
12.92%
decreased by 0.03%
1 Month
13.34%
increased by 0.39%
Analysis last updated: Saturday, August 22, 2026 at 02:21 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 24, 2025 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1022 | 2.56** |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8036 | 14.37*** |
γ leverage Additional response to negative shocks | 0.1167 | 3.71*** |
Persistence:
0.862
Half-life:
5 days
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