V-Lab
S&P 500 Scored & Screened Index (ESG) GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
11.41%
increased by 1.04%
1 Week
11.72%
increased by 1.35%
1 Month
12.70%
increased by 2.33%
Analysis last updated: Tuesday, August 18, 2026 at 11:06 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 28, 2005 to Aug 14, 2026Model Insight
Volatility shocks decay with a half-life of 29 trading days, meaning a shock loses half its impact after approximately 29 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0265 | 12.43*** |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8831 | 230.20*** |
γ leverage Additional response to negative shocks | 0.1866 | 18.06*** |
Persistence:
0.976
Half-life:
29 days
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