V-Lab
News Corp GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 28th, 2026
1 Day
29.45%
decreased by 2.89%
1 Week
29.20%
decreased by 3.14%
1 Month
28.74%
decreased by 3.60%
Analysis last updated: Friday, September 25, 2026 at 11:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 19, 2013 to Sep 25, 2026Model Insight
Volatility shocks decay with a half-life of 5 trading days, meaning a shock loses half its impact after approximately 5 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 5-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.4168 | 2.23** |
| αARCH | 0.1052 | 2.12** |
| βGARCH | 0.7283 | 11.24*** |
| γleverage | 0.0717 | 0.62 |
0.869
Persistence5d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4168 | 2.23** |
α ARCH Response to squared shocks | 0.1052 | 2.12** |
β GARCH Volatility persistence | 0.7283 | 11.24*** |
γ leverage Additional response to negative shocks | 0.0717 | 0.62 |
Persistence:
0.869
Half-life:
5 days
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