V-Lab
Siemens AG GARCH Volatility Analysis
Volatility prediction for Friday, September 4th, 2026
1 Day
25.90%
decreased by 0.27%
1 Week
25.96%
decreased by 0.21%
1 Month
26.17%
increased by 0.00%
Analysis last updated: Friday, September 4, 2026 at 06:51 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 28, 2026Model Insight
With persistence 0.995, volatility shocks have a half-life of 134 trading days (~0.5 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
σ
GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0194 | 3.03*** |
α ARCH Response to squared shocks | 0.0455 | 8.09*** |
β GARCH Volatility persistence | 0.9494 | 157.29*** |
Persistence:
0.995
Half-life:
134 days
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