V-Lab
Broadcom Inc GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
41.20%
increased by 6.31%
1 Week
41.15%
increased by 6.26%
1 Month
40.99%
increased by 6.10%
Analysis last updated: Monday, September 14, 2026 at 09:20 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 6, 2009 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 24 trading days, meaning a shock loses half its impact after approximately 24 days.
σ
GJR-GARCH Model
Tap to view equation
Shock decay: Shocks decay with a 24-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1847 | 2.37** |
| αARCH | 0.0468 | 2.41** |
| βGARCH | 0.9021 | 31.69*** |
| γleverage | 0.0450 | 1.17 |
0.971
Persistence24d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1847 | 2.37** |
α ARCH Response to squared shocks | 0.0468 | 2.41** |
β GARCH Volatility persistence | 0.9021 | 31.69*** |
γ leverage Additional response to negative shocks | 0.0450 | 1.17 |
Persistence:
0.971
Half-life:
24 days
Other GJR-GARCH Analyses on Equities