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V-Lab

Powerhouse Energy Group PLC Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

43.85%

decreased by 1.50%

1 Week

50.52%

increased by 5.17%

1 Month

57.36%

increased by 12.01%

Analysis last updated: Sunday, July 26, 2026 at 06:32 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Powerhouse Energy Group PLC S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 16, 2007 to Jul 24, 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

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.4931
3.08***
α

ARCH

Response to squared shocks

0.2425
4.97***
β

GARCH

Volatility persistence

0.5278
8.88***
γi Spline Coefficients
K=7
γ10.1585
0.50
γ2-0.2729
-0.63
γ30.2762
1.26
γ4-0.2052
-1.07
γ50.1379
0.83
γ6-0.3214
-1.87*
γ70.3776
2.60***

Persistence:

0.770

Half-life:

3 days