V-Lab
Alphabet Inc MEM Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
23.72%
increased by 1.70%
1 Week
24.19%
increased by 2.17%
1 Month
25.78%
increased by 3.76%
Analysis last updated: Friday, September 11, 2026 at 10:51 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 19, 2004 to Sep 11, 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 | 0.0891 | 1.89* |
| αARCH | 0.2136 | 9.93*** |
| βGARCH | 0.7670 | 53.64*** |
0.981
Persistence35d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0891 | 1.89* |
α ARCH Response to squared shocks | 0.2136 | 9.93*** |
β GARCH Volatility persistence | 0.7670 | 53.64*** |
Persistence:
0.981
Half-life:
35 days
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