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V-Lab

Jason Co Ltd Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

17.12%

decreased by 1.73%

1 Week

18.11%

decreased by 0.74%

1 Month

20.76%

increased by 1.91%

Analysis last updated: Saturday, August 22, 2026 at 10:09 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Jason Co Ltd S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 26, 2007 to Aug 21, 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 14 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.0004
1.81*
α

ARCH

Response to squared shocks

0.2424
5.80***
β

GARCH

Volatility persistence

0.7087
16.72***
γi Spline Coefficients
K=10
γ1-0.3739
-0.99
γ20.9878
1.89*
γ3-1.3602
-3.16***
γ41.4032
3.65***
γ5-1.2501
-4.92***
γ61.2151
5.16***
γ7-1.1150
-4.49***
γ80.8305
2.09**
γ9-0.6417
-1.04
γ100.4706
0.90

Persistence:

0.951

Half-life:

14 days