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V-Lab

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

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of SPI Energy Co Ltd APMEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 8, 2016 to May 15, 2026

Model 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

ParameterValuet-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:

-