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V-Lab
V-Lab

National Stock Exchange CNX Nifty Index Zero Slope Spline-GARCH Volatility Analysis

Volatility prediction for Tuesday, September 15th, 2026

1 Day

9.34%

decreased by 0.16%

1 Week

9.69%

increased by 0.19%

1 Month

10.81%

increased by 1.31%

Analysis last updated: Friday, September 11, 2026 at 12:04 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of National Stock Exchange CNX Nifty Index S0GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jul 2, 1990 to Sep 11, 2026

Model Insight

This model fits a time-varying baseline (a spline), so volatility mean-reverts toward a slowly-shifting long-run level rather than a constant. Short-run deviations decay with a half-life of 34 trading days.

τ

Zero Slope Spline-GARCH Model

Tap to view equation

Time-varying baseline: volatility reverts to a slowly-shifting spline trend
ParamValuet-stat
ωconst1.2308
6.88***
αARCH0.1031
9.49***
βGARCH0.8767
77.37***
γi Spline Coefficients
K=2
γ1-0.0029
-2.11**
γ20.0049
2.93***

0.980

Persistence

34d

Half-life
τ

Zero Slope Spline-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

1.2308
6.88***
α

ARCH

Response to squared shocks

0.1031
9.49***
β

GARCH

Volatility persistence

0.8767
77.37***
γi Spline Coefficients
K=2
γ1-0.0029
-2.11**
γ20.0049
2.93***

Persistence:

0.980

Half-life:

34 days