V-Lab
S&P BSE SENSEX Index MEM Volatility Analysis
Volatility prediction for Tuesday, September 15th, 2026
1 Day
10.72%
increased by 1.12%
1 Week
11.26%
increased by 1.66%
1 Month
13.18%
increased by 3.58%
Analysis last updated: Friday, September 11, 2026 at 12:02 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 31, 1990 to Sep 11, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 307 trading days (~1.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
μ
MEM Model
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High persistence: persistence 0.998, shock half-life ~307 days
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0247 | 2.77*** |
| αARCH | 0.2119 | 15.09*** |
| βGARCH | 0.7858 | 69.63*** |
0.998
Persistence307d
Half-lifeμ
MEM Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0247 | 2.77*** |
α ARCH Response to squared shocks | 0.2119 | 15.09*** |
β GARCH Volatility persistence | 0.7858 | 69.63*** |
Persistence:
0.998
Half-life:
307 days
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