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V-Lab

Chegg Inc GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

110.64%

decreased by 6.41%

1 Week

110.25%

decreased by 6.80%

1 Month

108.73%

decreased by 8.32%

Analysis last updated: Friday, July 24, 2026 at 10:25 PM UTC

Date Range:

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to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Chegg Inc GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Nov 13, 2013 to Jul 24, 2026

Model Insight

With persistence 0.994, volatility shocks have a half-life of 107 trading days (~0.4 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 3.43 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

21.7136
4.10***
α

ARCH

Response to squared shocks

0.0590
50.72***
β

GARCH

Volatility persistence

0.9936
689.97***
ν

DF

Student-t tail thickness

3.4301
29.33***

Persistence:

0.994

Half-life:

107 days