V-Lab
NASDAQ Composite Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
16.43%
decreased by 0.66%
1 Week
16.61%
decreased by 0.48%
1 Month
17.27%
increased by 0.18%
Analysis last updated: Saturday, August 22, 2026 at 12:13 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0310 | 23.68*** |
α ARCH Response to squared shocks | 0.0265 | 10.95*** |
β GARCH Volatility persistence | 0.8930 | 440.11*** |
γ leverage Additional response to negative shocks | 0.1264 | 24.33*** |
Persistence:
0.983
Half-life:
40 days
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