V-Lab
Yamada Consulting Group Co GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
27.97%
decreased by 0.05%
1 Week
31.00%
increased by 2.98%
1 Month
38.85%
increased by 10.83%
Analysis last updated: Wednesday, August 26, 2026 at 08:59 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 23, 2001 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 16 trading days, meaning a shock loses half its impact after approximately 16 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.4998 | 19.51*** |
α ARCH Response to squared shocks | 0.1470 | 16.53*** |
β GARCH Volatility persistence | 0.8137 | 160.90*** |
γ leverage Additional response to negative shocks | -0.0047 | -0.32 |
Persistence:
0.958
Half-life:
16 days
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