V-Lab
Kelly Services Inc GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
32.63%
decreased by 1.87%
1 Week
32.91%
decreased by 1.59%
1 Month
33.85%
decreased by 0.65%
Analysis last updated: Friday, September 11, 2026 at 11:05 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
Volatility shocks decay with a half-life of 34 trading days, meaning a shock loses half its impact after approximately 34 days. Returns follow a Student-t distribution with v = 4.30 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
Shock decay: Shocks decay with a 34-day half-lifev = 4.30 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 6.0294 | 1.34 |
| αARCH | 0.0676 | 5.92*** |
| βGARCH | 0.9798 | 64.79*** |
| νDF | 4.3029 | 2.28** |
0.980
Persistence34d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 6.0294 | 1.34 |
α ARCH Response to squared shocks | 0.0676 | 5.92*** |
β GARCH Volatility persistence | 0.9798 | 64.79*** |
ν DF Student-t tail thickness | 4.3029 | 2.28** |
Persistence:
0.980
Half-life:
34 days
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