V-Lab
Banco do Brasil SA GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
34.15%
decreased by 0.48%
1 Week
34.62%
decreased by 0.01%
1 Month
36.24%
increased by 1.61%
Analysis last updated: Tuesday, August 25, 2026 at 08:47 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 17, 1992 to Aug 21, 2026Model Insight
Volatility shocks decay with a half-life of 34 trading days, meaning a shock loses half its impact after approximately 34 days.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1595 | 4.32*** |
α ARCH Response to squared shocks | 0.0567 | 10.93*** |
β GARCH Volatility persistence | 0.9287 | 130.64*** |
γ leverage Additional response to negative shocks | -0.0111 | -0.78 |
Persistence:
0.980
Half-life:
34 days
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