V-Lab
NASDAQ 100 EGARCH Volatility Analysis
Volatility prediction for Thursday, September 17th, 2026
1 Day
17.08%
decreased by 1.02%
1 Week
17.38%
decreased by 0.72%
1 Month
18.51%
increased by 0.41%
Analysis last updated: Thursday, September 17, 2026 at 03:45 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 11, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 251% more than equivalent positive returns.
σ
EGARCH Model
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Leverage: Negative returns increase volatility 251% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0213 | 2.94*** |
| αARCH | 0.1676 | 12.28*** |
| βGARCH | 0.9778 | 268.54*** |
| γleverage | -0.0933 | -6.45*** |
0.978
Persistence31d
Half-lifeσ
EGARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0213 | 2.94*** |
α ARCH Response to squared shocks | 0.1676 | 12.28*** |
β GARCH Volatility persistence | 0.9778 | 268.54*** |
γ leverage Additional response to negative shocks | -0.0933 | -6.45*** |
Persistence:
0.978
Half-life:
31 days
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