V-Lab
Banco do Brasil SA GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 7th, 2026
1 Day
57.78%
increased by 2.95%
1 Week
57.32%
increased by 2.49%
1 Month
55.68%
increased by 0.85%
Analysis last updated: Wednesday, October 7, 2026 at 09:01 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Apr 17, 1992 to Oct 2, 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
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Shock decay: Shocks decay with a 34-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1594 | 1.09 |
| αARCH | 0.0564 | 2.76*** |
| βGARCH | 0.9288 | 32.83*** |
| γleverage | -0.0107 | -0.19 |
0.980
Persistence34d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1594 | 1.09 |
α ARCH Response to squared shocks | 0.0564 | 2.76*** |
β GARCH Volatility persistence | 0.9288 | 32.83*** |
γ leverage Additional response to negative shocks | -0.0107 | -0.19 |
Persistence:
0.980
Half-life:
34 days
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