V-Lab
Schwab U.S. Mid-Cap ETF EGARCH Volatility Analysis
Volatility prediction for Wednesday, September 9th, 2026
1 Day
15.19%
decreased by 0.18%
1 Week
15.35%
decreased by 0.02%
1 Month
15.88%
increased by 0.51%
Analysis last updated: Tuesday, September 8, 2026 at 10:42 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 13, 2011 to Sep 4, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible.
σ
EGARCH Model
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Leverage: volatility responds almost entirely to negative shocks
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0079 | 0.53 |
| αARCH | 0.1638 | 7.35*** |
| βGARCH | 0.9698 | 134.51*** |
| γleverage | -0.1410 | -6.92*** |
0.970
Persistence23d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0079 | 0.53 |
α ARCH Response to squared shocks | 0.1638 | 7.35*** |
β GARCH Volatility persistence | 0.9698 | 134.51*** |
γ leverage Additional response to negative shocks | -0.1410 | -6.92*** |
Persistence:
0.970
Half-life:
23 days
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