V-Lab
Ishares Core Equity ETF PTF GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 5th, 2026
1 Day
13.13%
decreased by 0.54%
1 Week
13.18%
decreased by 0.49%
1 Month
13.35%
decreased by 0.32%
Analysis last updated: Wednesday, August 5, 2026 at 09:20 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 13, 2019 to Jul 31, 2026Model Insight
Volatility shocks decay with a half-life of 19 trading days, meaning a shock loses half its impact after approximately 19 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0275 | 10.20*** |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.8852 | 128.43*** |
γ leverage Additional response to negative shocks | 0.1576 | 10.49*** |
Persistence:
0.964
Half-life:
19 days
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