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V-Lab

Global X Nasdaq-100 Cove ETF GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

23.59%

decreased by 0.11%

1 Week

23.54%

decreased by 0.16%

1 Month

23.34%

decreased by 0.36%

Analysis last updated: Saturday, July 25, 2026 at 09:13 AM UTC

Date Range:

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graph of Global X Nasdaq-100 Cove ETF GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Sep 14, 2011 to Jul 24, 2026

Model Insight

With persistence 0.990, volatility shocks have a half-life of 72 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 5.75 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

1.6884
4.94***
α

ARCH

Response to squared shocks

0.0796
33.61***
β

GARCH

Volatility persistence

0.9905
539.18***
ν

DF

Student-t tail thickness

5.7474
7.77***

Persistence:

0.990

Half-life:

72 days