V-Lab
Wal-Mart Stores Inc Asy. MEM Volatility Analysis
Volatility prediction for Monday, September 14th, 2026
1 Day
21.26%
decreased by 0.83%
1 Week
21.44%
decreased by 0.65%
1 Month
22.13%
increased by 0.04%
Analysis last updated: Friday, September 11, 2026 at 11:36 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Sep 11, 2026Model Insight
This asset exhibits a modest leverage effect: negative returns increase next-day volatility 36% more than equivalent positive returns.
μ
AMEM Model
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Leverage: Negative returns increase volatility 36% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0340 | 7.64*** |
| αARCH | 0.1401 | 10.88*** |
| βGARCH | 0.8244 | 79.48*** |
| γleverage | 0.0507 | 2.30** |
0.990
Persistence68d
Half-lifeμ
AMEM Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0340 | 7.64*** |
α ARCH Response to squared shocks | 0.1401 | 10.88*** |
β GARCH Volatility persistence | 0.8244 | 79.48*** |
γ leverage Additional response to negative shocks | 0.0507 | 2.30** |
Persistence:
0.990
Half-life:
68 days
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