V-Lab
Kelly Services Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
35.17%
decreased by 1.17%
1 Week
35.47%
decreased by 0.87%
1 Month
36.44%
increased by 0.10%
Analysis last updated: Friday, September 11, 2026 at 11:02 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 22 trading days, meaning a shock loses half its impact after approximately 22 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 22-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1956 | 4.91*** |
| αARCH | 0.0598 | 3.61*** |
| βGARCH | 0.8980 | 59.26*** |
| γleverage | 0.0226 | 0.92 |
0.969
Persistence22d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1956 | 4.91*** |
α ARCH Response to squared shocks | 0.0598 | 3.61*** |
β GARCH Volatility persistence | 0.8980 | 59.26*** |
γ leverage Additional response to negative shocks | 0.0226 | 0.92 |
Persistence:
0.969
Half-life:
22 days
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