V-Lab
Yamada Consulting Group Co GJR-GARCH Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
28.62%
decreased by 0.15%
1 Week
31.50%
increased by 2.73%
1 Month
39.07%
increased by 10.30%
Analysis last updated: Friday, September 11, 2026 at 08:25 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 23, 2001 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 17 trading days, meaning a shock loses half its impact after approximately 17 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 17-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.4919 | 4.88*** |
| αARCH | 0.1462 | 4.15*** |
| βGARCH | 0.8151 | 40.55*** |
| γleverage | -0.0044 | -0.08 |
0.959
Persistence17d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4919 | 4.88*** |
α ARCH Response to squared shocks | 0.1462 | 4.15*** |
β GARCH Volatility persistence | 0.8151 | 40.55*** |
γ leverage Additional response to negative shocks | -0.0044 | -0.08 |
Persistence:
0.959
Half-life:
17 days
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