News Corp GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 21st, 2026
1 Day
23.80%
increased by 1.53%
1 Week
24.91%
increased by 2.64%
1 Month
26.84%
increased by 4.57%
Analysis last updated: Tuesday, October 20, 2026 at 10:10 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 19, 2013 to Oct 16, 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 | 0.4176 | 2.24** |
| αARCH | 0.1058 | 2.13** |
| βGARCH | 0.7272 | 11.15*** |
| γleverage | 0.0712 | 0.62 |
0.869
Persistence5d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4176 | 2.24** |
α ARCH Response to squared shocks | 0.1058 | 2.13** |
β GARCH Volatility persistence | 0.7272 | 11.15*** |
γ leverage Additional response to negative shocks | 0.0712 | 0.62 |
Persistence:
0.869
Half-life:
5 days
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