Nikkei 225 GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 15th, 2026
1 Day
21.42%
decreased by 1.18%
1 Week
21.56%
decreased by 1.04%
1 Month
22.00%
decreased by 0.60%
Analysis last updated: Wednesday, October 14, 2026 at 07:02 AM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 9, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 391% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
Leverage: Negative returns increase volatility 391% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0656 | 6.79*** |
| αARCH | 0.0353 | 2.89*** |
| βGARCH | 0.8662 | 87.52*** |
| γleverage | 0.1381 | 4.57*** |
0.971
Persistence23d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0656 | 6.79*** |
α ARCH Response to squared shocks | 0.0353 | 2.89*** |
β GARCH Volatility persistence | 0.8662 | 87.52*** |
γ leverage Additional response to negative shocks | 0.1381 | 4.57*** |
Persistence:
0.971
Half-life:
23 days
Other GJR-GARCH Analyses on Equity Indices