V-Lab
S&P BSE SENSEX Index GJR-GARCH Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
13.72%
decreased by 0.31%
1 Week
13.97%
decreased by 0.06%
1 Month
14.95%
increased by 0.92%
Analysis last updated: Friday, July 24, 2026 at 12:03 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Jul 24, 2026Model Insight
With persistence 1.000, volatility shocks have a half-life of 3757 trading days (~14.9 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 74% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0142 | 17.04*** |
α ARCH Response to squared shocks | 0.0651 | 19.09*** |
β GARCH Volatility persistence | 0.9106 | 439.07*** |
γ leverage Additional response to negative shocks | 0.0482 | 7.78*** |
Persistence:
1.000
Half-life:
3757 days
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