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V-Lab

Inpex Corp Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Thursday, September 24th, 2026

1 Day

34.43%

decreased by 1.48%

1 Week

34.69%

decreased by 1.22%

1 Month

35.58%

decreased by 0.33%

Analysis last updated: Sunday, September 20, 2026 at 12:00 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Inpex Corp S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 17, 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 31 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
ωconst1.0544
9.12***
αARCH0.0891
5.49***
βGARCH0.8889
47.48***
γi Spline Coefficients
K=1
γ10.0000
0.05

0.978

Persistence

31d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.0544
9.12***
α

ARCH

Response to squared shocks

0.0891
5.49***
β

GARCH

Volatility persistence

0.8889
47.48***
γi Spline Coefficients
K=1
γ10.0000
0.05

Persistence:

0.978

Half-life:

31 days