Dow Jones Industrial Average APARCH Volatility Analysis
Volatility prediction for Monday, October 19th, 2026
1 Day
11.30%
1 Week
11.62%
1 Month
12.72%
Analysis last updated: Saturday, October 17, 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 Oct 16, 2026Model Insight
This asset exhibits a strong leverage effect: volatility responds almost entirely to negative shocks. The ARCH response to positive shocks is negligible. The volatility power δ = 1.05 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.
APARCH Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0275 | 8.94*** |
| αARCH | 0.0847 | 9.21*** |
| βGARCH | 0.9066 | 110.54*** |
| γleverage | 0.8371 | 7.28*** |
| δpower | 1.0514 | 9.72*** |
0.976
Persistence28d
Half-lifeAPARCH Model
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| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0275 | 8.94*** |
α ARCH Response to squared shocks | 0.0847 | 9.21*** |
β GARCH Volatility persistence | 0.9066 | 110.54*** |
γ leverage Additional response to negative shocks | 0.8371 | 7.28*** |
δ power Transformation power | 1.0514 | 9.72*** |
Persistence:
0.976
Half-life:
28 days
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