V-Lab
NASDAQ 100 GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 17th, 2026
1 Day
19.07%
decreased by 0.76%
1 Week
19.27%
decreased by 0.56%
1 Month
19.98%
increased by 0.15%
Analysis last updated: Saturday, August 15, 2026 at 12:05 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 14, 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 | 0.0323 | 22.10*** |
α ARCH Response to squared shocks | 0.0278 | 11.82*** |
β GARCH Volatility persistence | 0.9025 | 497.27*** |
γ leverage Additional response to negative shocks | 0.1157 | 21.83*** |
Persistence:
0.988
Half-life:
58 days
Other GJR-GARCH Analyses on Equity Indices