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V-Lab

Sui Southern Gas Co Ltd Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Wednesday, August 5th, 2026

1 Day

44.04%

increased by 1.28%

1 Week

44.44%

increased by 1.68%

1 Month

45.31%

increased by 2.55%

Analysis last updated: Wednesday, August 5, 2026 at 08:11 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Sui Southern Gas Co Ltd S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 3, 1993 to Jul 31, 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 7 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.4692
7.51***
α

ARCH

Response to squared shocks

0.1468
10.12***
β

GARCH

Volatility persistence

0.7574
35.36***
γi Spline Coefficients
K=3
γ10.0025
0.54
γ20.0026
0.41
γ3-0.0076
-2.68***

Persistence:

0.904

Half-life:

7 days