ServiceNow Inc GJR-GARCH Volatility Analysis
Volatility prediction for Friday, October 23rd, 2026
1 Day
39.47%
decreased by 0.60%
1 Week
39.63%
decreased by 0.44%
1 Month
40.20%
increased by 0.13%
Analysis last updated: Thursday, October 22, 2026 at 09:43 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jun 29, 2012 to Oct 16, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
GJR-GARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1536 | 2.26** |
| αARCH | 0.0029 | 0.40 |
| βGARCH | 0.9433 | 63.35*** |
| γleverage | 0.0664 | 3.77*** |
0.979
Persistence33d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1536 | 2.26** |
α ARCH Response to squared shocks | 0.0029 | 0.40 |
β GARCH Volatility persistence | 0.9433 | 63.35*** |
γ leverage Additional response to negative shocks | 0.0664 | 3.77*** |
Persistence:
0.979
Half-life:
33 days
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