V-Lab
Akita Bank Ltd GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
36.01%
increased by 3.37%
1 Week
35.63%
increased by 2.99%
1 Month
34.46%
increased by 1.82%
Analysis last updated: Friday, September 11, 2026 at 08:23 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 4, 1990 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 15 trading days, meaning a shock loses half its impact after approximately 15 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 15-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1699 | 2.77*** |
| αARCH | 0.0530 | 3.17*** |
| βGARCH | 0.8739 | 38.82*** |
| γleverage | 0.0582 | 1.29 |
0.956
Persistence15d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1699 | 2.77*** |
α ARCH Response to squared shocks | 0.0530 | 3.17*** |
β GARCH Volatility persistence | 0.8739 | 38.82*** |
γ leverage Additional response to negative shocks | 0.0582 | 1.29 |
Persistence:
0.956
Half-life:
15 days
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