NASDAQ Composite Index MEM Volatility Analysis
Volatility prediction for Tuesday, October 27th, 2026
1 Day
18.00%
decreased by 0.46%
1 Week
18.23%
decreased by 0.23%
1 Month
18.97%
increased by 0.51%
Analysis last updated: Tuesday, October 27, 2026 at 12:13 AM UTC
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News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Oct 23, 2026Model Insight
Volatility shocks decay with a half-life of 29 trading days, meaning a shock loses half its impact after approximately 29 days.
μ
MEM Model
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Shock decay: Shocks decay with a 29-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0464 | 2.78*** |
| αARCH | 0.2421 | 13.59*** |
| βGARCH | 0.7345 | 61.83*** |
0.977
Persistence29d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0464 | 2.78*** |
α ARCH Response to squared shocks | 0.2421 | 13.59*** |
β GARCH Volatility persistence | 0.7345 | 61.83*** |
Persistence:
0.977
Half-life:
29 days
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