V-Lab
Plc Spa GJR-GARCH Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
37.58%
decreased by 0.03%
1 Week
43.07%
increased by 5.46%
1 Month
47.44%
increased by 9.83%
Analysis last updated: Saturday, August 22, 2026 at 11:19 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 20, 2006 to Aug 21, 2026Model Insight
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 80% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.8495 | 18.16*** |
α ARCH Response to squared shocks | 0.1528 | 13.40*** |
β GARCH Volatility persistence | 0.4879 | 24.86*** |
γ leverage Additional response to negative shocks | 0.1226 | 4.56*** |
Persistence:
0.702
Half-life:
2 days
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