V-Lab
KBR Inc GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
29.94%
decreased by 0.76%
1 Week
30.67%
decreased by 0.03%
1 Month
32.85%
increased by 2.15%
Analysis last updated: Saturday, September 12, 2026 at 12:13 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Nov 16, 2006 to Sep 11, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 300% more than equivalent positive returns.
σ
GJR-GARCH Model
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Leverage: Negative returns increase volatility 300% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.2259 | 3.95*** |
| αARCH | 0.0291 | 2.34** |
| βGARCH | 0.8894 | 59.70*** |
| γleverage | 0.0873 | 2.76*** |
0.962
Persistence18d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.2259 | 3.95*** |
α ARCH Response to squared shocks | 0.0291 | 2.34** |
β GARCH Volatility persistence | 0.8894 | 59.70*** |
γ leverage Additional response to negative shocks | 0.0873 | 2.76*** |
Persistence:
0.962
Half-life:
18 days
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