V-Lab
Broadcom Inc GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
37.96%
increased by 5.04%
1 Week
37.97%
increased by 5.05%
1 Month
38.00%
increased by 5.08%
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 25 trading days, meaning a shock loses half its impact after approximately 25 days. Returns follow a Student-t distribution with v = 4.74 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
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Shock decay: Shocks decay with a 25-day half-lifev = 4.74 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 5.7745 | 1.26 |
| αARCH | 0.0689 | 4.10*** |
| βGARCH | 0.9725 | 44.99*** |
| νDF | 4.7443 | 1.21 |
0.972
Persistence25d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 5.7745 | 1.26 |
α ARCH Response to squared shocks | 0.0689 | 4.10*** |
β GARCH Volatility persistence | 0.9725 | 44.99*** |
ν DF Student-t tail thickness | 4.7443 | 1.21 |
Persistence:
0.972
Half-life:
25 days
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