V-Lab
Tadawul All Share TASI Index GJR-GARCH Volatility Analysis
Volatility prediction for Saturday, July 25th, 2026
1 Day
9.59%
decreased by 0.32%
1 Week
10.57%
increased by 0.66%
1 Month
13.60%
increased by 3.69%
Analysis last updated: Friday, July 24, 2026 at 05:40 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Oct 19, 1998 to Jul 23, 2026Model Insight
This asset exhibits a strong leverage effect: negative returns increase next-day volatility 140% more than equivalent positive returns.
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0431 | 27.44*** |
α ARCH Response to squared shocks | 0.1082 | 21.79*** |
β GARCH Volatility persistence | 0.8060 | 241.18*** |
γ leverage Additional response to negative shocks | 0.1511 | 15.80*** |
Persistence:
0.990
Half-life:
67 days
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