V-Lab
Nikkei 225 GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
30.11%
decreased by 1.88%
1 Week
29.78%
decreased by 2.21%
1 Month
28.68%
decreased by 3.31%
Analysis last updated: Friday, August 21, 2026 at 07:03 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 395% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0657 | 27.13*** |
α ARCH Response to squared shocks | 0.0352 | 11.44*** |
β GARCH Volatility persistence | 0.8657 | 348.81*** |
γ leverage Additional response to negative shocks | 0.1393 | 18.36*** |
Persistence:
0.971
Half-life:
23 days
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