V-Lab
Hevol Services Group Co Ltd EGARCH Volatility Analysis
Volatility prediction for Thursday, September 3rd, 2026
1 Day
45.70%
decreased by 3.44%
1 Week
46.58%
decreased by 2.56%
1 Month
49.34%
increased by 0.20%
Analysis last updated: Thursday, September 3, 2026 at 06:47 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 15 trading days, meaning a shock loses half its impact after approximately 15 days.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1159 | 2.46** |
α ARCH Response to squared shocks | 0.1980 | 2.81*** |
β GARCH Volatility persistence | 0.9545 | 49.20*** |
γ leverage Additional response to negative shocks | 0.0890 | 1.13 |
Persistence:
0.954
Half-life:
15 days
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