V-Lab
Softbank Group Corp MEM Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
64.40%
increased by 2.14%
1 Week
64.58%
increased by 2.32%
1 Month
65.29%
increased by 3.03%
Analysis last updated: Friday, September 11, 2026 at 06:56 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Feb 16, 2000 to Sep 4, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 1487 trading days (~5.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
MEM Model
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High persistence: persistence 1.000, shock half-life ~1487 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0536 | 2.08** |
| αARCH | 0.0927 | 7.49*** |
| βGARCH | 0.9068 | 48.02*** |
1.000
Persistence1487d
Half-lifeμ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0536 | 2.08** |
α ARCH Response to squared shocks | 0.0927 | 7.49*** |
β GARCH Volatility persistence | 0.9068 | 48.02*** |
Persistence:
1.000
Half-life:
1487 days
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