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Hevol Services Group Co Ltd AGARCH Volatility Analysis

Volatility prediction for Tuesday, September 8th, 2026

1 Day

40.90%

decreased by 2.07%

1 Week

42.29%

decreased by 0.68%

1 Month

46.52%

increased by 3.55%

Analysis last updated: Tuesday, September 8, 2026 at 08:16 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

All

graph of Hevol Services Group Co Ltd AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 12, 2019 to Aug 28, 2026

Model Insight

Volatility shocks decay with a half-life of 21 trading days, meaning a shock loses half its impact after approximately 21 days.

σ

AGARCH Model

Tap to view equation

Shock decay: Shocks decay with a 21-day half-life
ParamValuet-stat
ωconst0.1388
0.33
αARCH0.1644
5.83***
βGARCH0.8037
30.87***
γleverage-1.3733
-1.23

0.968

Persistence

21d

Half-life
σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1388
0.33
α

ARCH

Response to squared shocks

0.1644
5.83***
β

GARCH

Volatility persistence

0.8037
30.87***
γ

leverage

Additional response to negative shocks

-1.3733
-1.23

Persistence:

0.968

Half-life:

21 days