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BOYD GROUP SERVICES INC Spline-GARCH Volatility Analysis

Volatility prediction for Monday, October 19th, 2026

1 Day

29.72%

unchanged at 0.00%

1 Week

29.72%

unchanged at 0.00%

1 Month

29.72%

unchanged at 0.00%

Analysis last updated: Friday, October 16, 2026 at 10:56 PM UTC

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Date Range:

from

10/16/2024

to

10/16/2026

6M ·

All

graph of BOYD GROUP SERVICES INC SGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Oct 30, 2025 to Oct 16, 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 3 trading days.

τ

Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst1.5600
1.84*
αARCH0.0000
0.00
βGARCH0.7768
0.60
∑γi Spline Coefficients
K=4
γ195.3957
4.15***
γ2-142.7263
-4.42***
γ371.5653
2.58***
γ4-60.0750
-1.46

0.777

Persistence

3d

Half-life
τ

Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.5600
1.84*
α

ARCH

Response to squared shocks

0.0000
0.00
β

GARCH

Volatility persistence

0.7768
0.60
∑γi Spline Coefficients
K=4
γ195.3957
4.15***
γ2-142.7263
-4.42***
γ371.5653
2.58***
γ4-60.0750
-1.46

Persistence:

0.777

Half-life:

3 days