NASDAQ Composite Index EGARCH Volatility Analysis
Volatility prediction for Monday, July 20th, 2026
1 Day
23.75%
increased by 1.49%
1 Week
23.67%
increased by 1.41%
1 Month
23.40%
increased by 1.14%
Analysis last updated: Saturday, July 18, 2026 at 12:04 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Jul 17, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 245% more than equivalent positive returns.
σ
EGARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0162 | 10.13*** |
α ARCH Response to squared shocks | 0.1709 | 46.75*** |
β GARCH Volatility persistence | 0.9756 | 1,113.71*** |
γ leverage Additional response to negative shocks | -0.0941 | -26.32*** |
Persistence:
0.976
Half-life:
28 days
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