V-Lab
Bayer AG GJR-GARCH Volatility Analysis
Volatility prediction for Monday, September 21st, 2026
1 Day
23.55%
increased by 1.25%
1 Week
23.80%
increased by 1.50%
1 Month
24.69%
increased by 2.39%
Analysis last updated: Saturday, September 19, 2026 at 08:28 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 18, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 207% more than equivalent positive returns.
σ
GJR-GARCH Model
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Leverage: Negative returns increase volatility 207% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0514 | 4.67*** |
| αARCH | 0.0261 | 3.82*** |
| βGARCH | 0.9341 | 133.10*** |
| γleverage | 0.0541 | 3.68*** |
0.987
Persistence54d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0514 | 4.67*** |
α ARCH Response to squared shocks | 0.0261 | 3.82*** |
β GARCH Volatility persistence | 0.9341 | 133.10*** |
γ leverage Additional response to negative shocks | 0.0541 | 3.68*** |
Persistence:
0.987
Half-life:
54 days
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