V-Lab
Smart Powerr Corp EGARCH Volatility Analysis
Volatility prediction for Monday, September 7th, 2026
1 Day
251.18%
decreased by 9.64%
1 Week
253.65%
decreased by 7.17%
1 Month
263.57%
increased by 2.75%
Analysis last updated: Saturday, September 5, 2026 at 09:26 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 4, 2001 to Sep 4, 2026Model Insight
With persistence 0.995, volatility shocks have a half-life of 133 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
EGARCH Model
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High persistence: persistence 0.995, shock half-life ~133 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0385 | 1.97** |
| αARCH | 0.1066 | 5.10*** |
| βGARCH | 0.9948 | 262.83*** |
| γleverage | -0.0152 | -0.60 |
0.995
Persistence133d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0385 | 1.97** |
α ARCH Response to squared shocks | 0.1066 | 5.10*** |
β GARCH Volatility persistence | 0.9948 | 262.83*** |
γ leverage Additional response to negative shocks | -0.0152 | -0.60 |
Persistence:
0.995
Half-life:
133 days
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