V-Lab
Siemens AG MF2-GARCH Volatility Analysis
Volatility prediction for Tuesday, August 25th, 2026
1 Day
29.07%
decreased by 0.63%
1 Week
29.64%
decreased by 0.06%
1 Month
31.02%
increased by 1.32%
Analysis last updated: Tuesday, August 25, 2026 at 06:39 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
MF2-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
m window Rolling window length | 56 | |
α ARCH Response to squared shocks | 0.0184 | 8.78*** |
β GARCH Volatility persistence | 0.8693 | 129.86*** |
γ leverage Additional response to negative shocks | 0.0817 | 20.22*** |
λ₁ tau intercept Baseline long-term coefficient | 0.0092 | 2.49** |
λ₂ forecast adj. Forecast performance sensitivity | 0.0251 | 2.78*** |
λ₃ tau persistence Long-term factor persistence | 0.9720 | 97.50*** |
Persistence:
0.929
Half-life:
9 days
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