Merck KGaA GJR-GARCH Volatility Analysis
Volatility prediction for Thursday, October 15th, 2026
1 Day
25.28%
increased by 0.89%
1 Week
25.39%
increased by 1.00%
1 Month
25.80%
increased by 1.41%
Analysis last updated: Thursday, October 15, 2026 at 07:04 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 20, 1995 to Oct 9, 2026Model Insight
Volatility shocks decay with a half-life of 52 trading days, meaning a shock loses half its impact after approximately 52 days.
σ
GJR-GARCH Model
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Shock decay: Shocks decay with a 52-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0452 | 3.94*** |
| αARCH | 0.0256 | 4.00*** |
| βGARCH | 0.9522 | 147.12*** |
| γleverage | 0.0177 | 1.40 |
0.987
Persistence52d
Half-lifeσ
GJR-GARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0452 | 3.94*** |
α ARCH Response to squared shocks | 0.0256 | 4.00*** |
β GARCH Volatility persistence | 0.9522 | 147.12*** |
γ leverage Additional response to negative shocks | 0.0177 | 1.40 |
Persistence:
0.987
Half-life:
52 days
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