V-Lab
Fidelity Blue Chip Growth ETF GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
18.19%
decreased by 0.43%
1 Week
18.63%
increased by 0.01%
1 Month
19.99%
increased by 1.37%
Analysis last updated: Friday, September 11, 2026 at 10:06 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 4, 2020 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 22 trading days, meaning a shock loses half its impact after approximately 22 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 22-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0740 | 2.08** |
| αARCH | 0.0000 | 0.00 |
| βGARCH | 0.9008 | 47.56*** |
| γleverage | 0.1359 | 2.89*** |
0.969
Persistence22d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0740 | 2.08** |
α ARCH Response to squared shocks | 0.0000 | 0.00 |
β GARCH Volatility persistence | 0.9008 | 47.56*** |
γ leverage Additional response to negative shocks | 0.1359 | 2.89*** |
Persistence:
0.969
Half-life:
22 days
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