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Capgemini Se Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

40.06%

decreased by 0.22%

1 Week

39.82%

decreased by 0.46%

1 Month

38.96%

decreased by 1.32%

Analysis last updated: Saturday, September 19, 2026 at 08:38 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Capgemini Se S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 16, 2004 to Sep 18, 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 52 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
ωconst1.1664
9.22***
αARCH0.0391
4.99***
βGARCH0.9477
95.28***
γi Spline Coefficients
K=1
γ10.0008
1.65*

0.987

Persistence

52d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1664
9.22***
α

ARCH

Response to squared shocks

0.0391
4.99***
β

GARCH

Volatility persistence

0.9477
95.28***
γi Spline Coefficients
K=1
γ10.0008
1.65*

Persistence:

0.987

Half-life:

52 days