V-Lab
Softbank Group Corp GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
68.99%
decreased by 2.68%
1 Week
68.66%
decreased by 3.01%
1 Month
67.42%
decreased by 4.25%
Analysis last updated: Friday, September 11, 2026 at 06:56 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 16, 2000 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 49 trading days, meaning a shock loses half its impact after approximately 49 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 49-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1740 | 3.36*** |
| αARCH | 0.0779 | 4.71*** |
| βGARCH | 0.8897 | 67.83*** |
| γleverage | 0.0365 | 1.20 |
0.986
Persistence49d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1740 | 3.36*** |
α ARCH Response to squared shocks | 0.0779 | 4.71*** |
β GARCH Volatility persistence | 0.8897 | 67.83*** |
γ leverage Additional response to negative shocks | 0.0365 | 1.20 |
Persistence:
0.986
Half-life:
49 days
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