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Boeing Co/The Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Friday, October 30th, 2026

1 Day

52.40%

decreased by 1.00%

1 Week

50.85%

decreased by 2.55%

1 Month

46.17%

decreased by 7.23%

Analysis last updated: Thursday, October 29, 2026 at 10:51 PM UTC

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Date Range:

from

10/29/2024

to

10/29/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Boeing Co/The S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Oct 23, 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 12 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
ωconst1.0487
7.78***
αARCH0.0757
7.27***
βGARCH0.8696
51.62***
∑γi Spline Coefficients
K=10
γ10.0217
0.51
γ20.0471
0.68
γ3-0.1491
-2.60***
γ40.0725
1.37
γ50.0833
1.99**
γ6-0.1667
-4.52***
γ70.1600
3.69***
γ8-0.0519
-1.01
γ9-0.0706
-1.44
γ100.0704
2.22**

0.945

Persistence

12d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0487
7.78***
α

ARCH

Response to squared shocks

0.0757
7.27***
β

GARCH

Volatility persistence

0.8696
51.62***
∑γi Spline Coefficients
K=10
γ10.0217
0.51
γ20.0471
0.68
γ3-0.1491
-2.60***
γ40.0725
1.37
γ50.0833
1.99**
γ6-0.1667
-4.52***
γ70.1600
3.69***
γ8-0.0519
-1.01
γ9-0.0706
-1.44
γ100.0704
2.22**

Persistence:

0.945

Half-life:

12 days