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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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Date Range:

from

10/28/2024

to

10/28/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Merck & Co Inc MEM

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Oct 23, 2026

Model 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

Tap to view equation

Shock decay: Shocks decay with a 35-day half-life
ParamValuet-stat
ωconst0.0595
2.13**
αARCH0.1496
9.26***
βGARCH0.8308
74.72***

0.980

Persistence

35d

Half-life
μ

MEM Model

Tap to view equation

ParameterValuet-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