V-Lab
NASDAQ 100 GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
16.28%
decreased by 0.59%
1 Week
16.59%
decreased by 0.28%
1 Month
17.66%
increased by 0.79%
Analysis last updated: Saturday, September 5, 2026 at 12:04 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 4, 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
Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0325 | 5.55*** |
| αARCH | 0.0279 | 2.96*** |
| βGARCH | 0.9022 | 124.20*** |
| γleverage | 0.1159 | 5.48*** |
0.988
Persistence58d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0325 | 5.55*** |
α ARCH Response to squared shocks | 0.0279 | 2.96*** |
β GARCH Volatility persistence | 0.9022 | 124.20*** |
γ leverage Additional response to negative shocks | 0.1159 | 5.48*** |
Persistence:
0.988
Half-life:
58 days
Other GJR-GARCH Analyses on Equity Indices