V-Lab
iShares Russell 2000 ETF GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 29th, 2026
1 Day
17.21%
decreased by 0.04%
1 Week
17.46%
increased by 0.21%
1 Month
18.29%
increased by 1.04%
Analysis last updated: Monday, September 28, 2026 at 09:49 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 29, 2000 to Sep 25, 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 | 0.0443 | 4.42*** |
| αARCH | 0.0127 | 1.52 |
| βGARCH | 0.8994 | 105.81*** |
| γleverage | 0.1305 | 5.58*** |
0.977
Persistence30d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0443 | 4.42*** |
α ARCH Response to squared shocks | 0.0127 | 1.52 |
β GARCH Volatility persistence | 0.8994 | 105.81*** |
γ leverage Additional response to negative shocks | 0.1305 | 5.58*** |
Persistence:
0.977
Half-life:
30 days
Other iShares Russell 2000 ETF Analyses
Other GJR-GARCH Analyses on ETFs