V-Lab
Wal-Mart Stores Inc EGARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
29.81%
increased by 0.04%
1 Week
29.86%
increased by 0.09%
1 Month
30.02%
increased by 0.25%
Analysis last updated: Friday, September 4, 2026 at 10:27 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
This asset exhibits a notable leverage effect: negative returns increase next-day volatility 75% more than equivalent positive returns.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0182 | 2.33** |
α ARCH Response to squared shocks | 0.1195 | 6.73*** |
β GARCH Volatility persistence | 0.9867 | 241.44*** |
γ leverage Additional response to negative shocks | -0.0327 | -2.42** |
Persistence:
0.987
Half-life:
52 days
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