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Costar Group Co Ltd Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, October 12th, 2026

1 Day

36.17%

decreased by 0.81%

1 Week

37.08%

increased by 0.10%

1 Month

39.83%

increased by 2.85%

Analysis last updated: Saturday, October 10, 2026 at 07:38 PM UTC

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Date Range:

from

10/09/2024

to

10/09/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Costar Group Co Ltd S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 3, 2007 to Oct 9, 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 19 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
ωconst1.1974
12.03***
αARCH0.0740
7.04***
βGARCH0.8898
52.83***
∑γi Spline Coefficients
K=1
γ10.0016
2.64***

0.964

Persistence

19d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.1974
12.03***
α

ARCH

Response to squared shocks

0.0740
7.04***
β

GARCH

Volatility persistence

0.8898
52.83***
∑γi Spline Coefficients
K=1
γ10.0016
2.64***

Persistence:

0.964

Half-life:

19 days