V-Lab
Vulcan Infrastructure and Power Inc Asy. MEM Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Thursday, August 6th, 2026
1 Day
90.23%
decreased by 9.98%
1 Week
92.71%
decreased by 7.50%
1 Month
102.04%
increased by 1.83%
Analysis last updated: Wednesday, August 5, 2026 at 09:35 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 15, 2021 to Jul 31, 2026Model Insight
Estimated persistence of 1.000 is at or above 1 (non-stationary): volatility shocks do not decay and the long-run variance is undefined, so long-horizon forecasts should be treated with caution.
μ
AMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.9015 | 12.73*** |
α ARCH Response to squared shocks | 0.2845 | 21.10*** |
β GARCH Volatility persistence | 0.7070 | 102.52*** |
γ leverage Additional response to negative shocks | 0.0170 | 0.80 |
Persistence:
1.000
Half-life:
-
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