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India NSE Volatility Index GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, August 21st, 2026

1 Day

64.45%

increased by 5.98%

1 Week

66.60%

increased by 8.13%

1 Month

73.11%

increased by 14.64%

Analysis last updated: Friday, August 21, 2026 at 08:14 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of India NSE Volatility Index GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 3, 2008 to Apr 4, 2025

Model 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

ParameterValuet-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