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V-Lab
V-Lab

KBR Inc Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

26.66%

decreased by 0.69%

1 Week

27.55%

increased by 0.20%

1 Month

29.83%

increased by 2.48%

Analysis last updated: Saturday, September 12, 2026 at 12:15 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of KBR Inc S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 16, 2006 to Sep 11, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 11 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst1.2303
11.60***
αARCH0.0856
5.14***
βGARCH0.8533
33.32***
γi Spline Coefficients
K=1
γ10.0016
3.15***

0.939

Persistence

11d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.2303
11.60***
α

ARCH

Response to squared shocks

0.0856
5.14***
β

GARCH

Volatility persistence

0.8533
33.32***
γi Spline Coefficients
K=1
γ10.0016
3.15***

Persistence:

0.939

Half-life:

11 days