SPI Energy Co Ltd Asy. Power MEM Volatility Analysis
High-persistence model: shocks decay very slowly, so the theoretical long-run value may not be practically meaningful
Volatility prediction for Monday, May 18th, 2026
1 Day
2,393.11%
increased by 268.56%
1 Week
2,393.15%
increased by 268.60%
1 Month
2,393.34%
increased by 268.79%
Analysis last updated: Saturday, May 16, 2026 at 01:27 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 8, 2016 to May 15, 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
APMEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.3912 | 1.43 |
α ARCH Response to squared shocks | 0.0409 | 8.72*** |
β GARCH Volatility persistence | 0.9591 | 156.52*** |
γ leverage Additional response to negative shocks | 0.0988 | 1.70* |
δ power Transformation power | 1.9742 | 8.69*** |
Persistence:
1.000
Half-life:
-
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