V-Lab
Dow Jones Transportation Average GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, August 26th, 2026
1 Day
17.25%
decreased by 0.55%
1 Week
17.51%
decreased by 0.29%
1 Month
18.40%
increased by 0.60%
Analysis last updated: Wednesday, August 26, 2026 at 12:04 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 2, 1990 to Aug 21, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 255% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0396 | 19.54*** |
α ARCH Response to squared shocks | 0.0326 | 11.15*** |
β GARCH Volatility persistence | 0.9076 | 364.79*** |
γ leverage Additional response to negative shocks | 0.0831 | 13.73*** |
Persistence:
0.982
Half-life:
38 days
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