SDI Ltd MEM Volatility Analysis
Inactive
Last recorded values (Friday, June 26th, 2026):
1 Day
26.28%
1 Week
26.94%
1 Month
29.34%
Analysis last updated: Friday, June 26, 2026 at 06:56 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 21, 2001 to Jun 19, 2026Model Insight
With persistence 0.994, volatility shocks have a half-life of 111 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0874 | 5.62*** |
α ARCH Response to squared shocks | 0.0558 | 21.69*** |
β GARCH Volatility persistence | 0.9380 | 446.23*** |
Persistence:
0.994
Half-life:
111 days
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