V-Lab
HP Inc MEM Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
51.93%
decreased by 2.87%
1 Week
51.47%
decreased by 3.33%
1 Month
49.86%
decreased by 4.94%
Analysis last updated: Friday, September 4, 2026 at 10:55 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 4, 2026Model Insight
Volatility shocks decay with a half-life of 28 trading days, meaning a shock loses half its impact after approximately 28 days.
μ
MEM Model
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Shock decay: Shocks decay with a 28-day half-life
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.1648 | 2.87*** |
| αARCH | 0.1854 | 11.13*** |
| βGARCH | 0.7901 | 66.01*** |
0.975
Persistence28d
Half-lifeμ
MEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.1648 | 2.87*** |
α ARCH Response to squared shocks | 0.1854 | 11.13*** |
β GARCH Volatility persistence | 0.7901 | 66.01*** |
Persistence:
0.975
Half-life:
28 days
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