V-Lab
IBEX 35 Index GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
12.21%
decreased by 0.24%
1 Week
12.79%
increased by 0.34%
1 Month
14.59%
increased by 2.14%
Analysis last updated: Tuesday, August 25, 2026 at 04:05 PM 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 397% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0438 | 22.80*** |
α ARCH Response to squared shocks | 0.0317 | 10.99*** |
β GARCH Volatility persistence | 0.8808 | 420.82*** |
γ leverage Additional response to negative shocks | 0.1261 | 20.88*** |
Persistence:
0.976
Half-life:
28 days
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