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V-Lab

Catalyst Media Group PLC Spline-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 1st, 2026

1 Day

31.82%

decreased by 0.93%

1 Week

34.71%

increased by 1.96%

1 Month

37.38%

increased by 4.63%

Analysis last updated: Sunday, August 30, 2026 at 03:24 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Catalyst Media Group PLC SGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 2007 to Aug 28, 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 2 trading days.

τ

Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.3726
3.00***
α

ARCH

Response to squared shocks

0.1579
2.99***
β

GARCH

Volatility persistence

0.5738
5.24***
γi Spline Coefficients
K=10
γ10.8916
0.33
γ2-0.9432
-0.22
γ3-0.8563
-0.29
γ43.4912
1.10
γ5-4.5073
-1.32
γ62.1305
0.64
γ71.2304
0.43
γ8-5.6342
-2.49**
γ911.4450
5.33***
γ10-15.6087
-4.39***

Persistence:

0.732

Half-life:

2 days