V-Lab
Conpet SA GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
15.40%
decreased by 0.36%
1 Week
16.84%
increased by 1.08%
1 Month
21.05%
increased by 5.29%
Analysis last updated: Tuesday, August 25, 2026 at 08:15 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 24, 2009 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 30 trading days, meaning a shock loses half its impact after approximately 30 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1154 | 11.57*** |
α ARCH Response to squared shocks | 0.1313 | 7.13*** |
β GARCH Volatility persistence | 0.8383 | 129.39*** |
γ leverage Additional response to negative shocks | 0.0152 | 0.52 |
Persistence:
0.977
Half-life:
30 days
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