V-Lab
NASDAQ Composite Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
13.91%
decreased by 0.28%
1 Week
14.23%
increased by 0.04%
1 Month
15.29%
increased by 1.10%
Analysis last updated: Saturday, September 12, 2026 at 12:54 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 11, 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 | 0.0311 | 5.93*** |
| αARCH | 0.0265 | 2.74*** |
| βGARCH | 0.8929 | 110.03*** |
| γleverage | 0.1266 | 6.11*** |
0.983
Persistence40d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0311 | 5.93*** |
α ARCH Response to squared shocks | 0.0265 | 2.74*** |
β GARCH Volatility persistence | 0.8929 | 110.03*** |
γ leverage Additional response to negative shocks | 0.1266 | 6.11*** |
Persistence:
0.983
Half-life:
40 days
Other NASDAQ Composite Index Analyses
Other GJR-GARCH Analyses on Equity Indices