Merck & Co Inc MEM Volatility Analysis
Volatility prediction for Thursday, October 29th, 2026
1 Day
36.81%
decreased by 1.82%
1 Week
36.50%
decreased by 2.13%
1 Month
35.38%
decreased by 3.25%
Analysis last updated: Wednesday, October 28, 2026 at 10:20 PM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Oct 23, 2026Model Insight
Volatility shocks decay with a half-life of 35 trading days, meaning a shock loses half its impact after approximately 35 days.
μ
MEM Model
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Shock decay: Shocks decay with a 35-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0595 | 2.13** |
| αARCH | 0.1496 | 9.26*** |
| βGARCH | 0.8308 | 74.72*** |
0.980
Persistence35d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0595 | 2.13** |
α ARCH Response to squared shocks | 0.1496 | 9.26*** |
β GARCH Volatility persistence | 0.8308 | 74.72*** |
Persistence:
0.980
Half-life:
35 days
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