Global X S&P 500 Christin VL GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, July 21st, 2026
1 Day
13.11%
decreased by 0.25%
1 Week
13.26%
decreased by 0.10%
1 Month
13.52%
increased by 0.16%
Analysis last updated: Monday, July 20, 2026 at 09:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 24, 2025 to Jul 17, 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 | 0.1047 | 2.35** |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8083 | 12.97*** |
γ leverage Additional response to negative shocks | 0.1027 | 3.42*** |
Persistence:
0.860
Half-life:
5 days
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