V-Lab
India NSE Volatility Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, July 24th, 2026
1 Day
90.73%
decreased by 4.90%
1 Week
90.82%
decreased by 4.81%
1 Month
91.14%
decreased by 4.49%
Analysis last updated: Friday, July 24, 2026 at 11:19 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Mar 3, 2008 to Apr 4, 2025Model Insight
Volatility shocks decay with a half-life of 20 trading days, meaning a shock loses half its impact after approximately 20 days. Returns follow a Student-t distribution with v = 3.94 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 33.7471 | 5.72*** |
α ARCH Response to squared shocks | 0.0635 | 19.98*** |
β GARCH Volatility persistence | 0.9665 | 198.37*** |
ν DF Student-t tail thickness | 3.9399 | 6.47*** |
Persistence:
0.966
Half-life:
20 days
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