Sonda S.A. GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, July 14th, 2026
1 Day
23.53%
decreased by 0.91%
1 Week
23.78%
decreased by 0.66%
1 Month
24.56%
increased by 0.12%
Analysis last updated: Tuesday, July 14, 2026 at 05:58 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 9, 2006 to Jul 10, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 208% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0939 | 15.87*** |
α ARCH Response to squared shocks | 0.0396 | 13.30*** |
β GARCH Volatility persistence | 0.8875 | 248.66*** |
γ leverage Additional response to negative shocks | 0.0822 | 7.83*** |
Persistence:
0.968
Half-life:
21 days
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