V-Lab
iShares Russell 2000 ETF GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, July 28th, 2026
1 Day
14.97%
decreased by 0.38%
1 Week
15.37%
increased by 0.02%
1 Month
16.67%
increased by 1.32%
Analysis last updated: Monday, July 27, 2026 at 09:36 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 29, 2000 to Jul 24, 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 | 0.0450 | 17.77*** |
α ARCH Response to squared shocks | 0.0126 | 6.02*** |
β GARCH Volatility persistence | 0.8985 | 419.48*** |
γ leverage Additional response to negative shocks | 0.1318 | 22.31*** |
Persistence:
0.977
Half-life:
30 days
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