V-Lab
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
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 12, 2019 to Aug 28, 2026Model 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
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1388 | 0.33 |
| αARCH | 0.1644 | 5.83*** |
| βGARCH | 0.8037 | 30.87*** |
| γleverage | -1.3733 | -1.23 |
0.968
Persistence21d
Half-lifeσ
AGARCH Model
Tap to view equation
| Parameter | Value | t-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
Other Hevol Services Group Co Ltd Analyses
Other AGARCH Analyses on International Equities