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V-Lab

Zhihu Inc GAS-GARCH Student T Volatility Analysis

Volatility prediction for Friday, September 11th, 2026

1 Day

68.61%

decreased by 5.00%

1 Week

68.68%

decreased by 4.93%

1 Month

68.91%

decreased by 4.70%

Analysis last updated: Friday, September 11, 2026 at 07:17 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

All

graph of Zhihu Inc GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Apr 22, 2022 to Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 25 trading days, meaning a shock loses half its impact after approximately 25 days. Returns follow a Student-t distribution with v = 4.54 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

Shock decay: Shocks decay with a 25-day half-lifev = 4.54 · fat tails
ParamValuet-stat
ωconst19.3888
0.75
αARCH0.1034
4.11***
βGARCH0.9722
23.20***
νDF4.5392
1.16

0.972

Persistence

25d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

19.3888
0.75
α

ARCH

Response to squared shocks

0.1034
4.11***
β

GARCH

Volatility persistence

0.9722
23.20***
ν

DF

Student-t tail thickness

4.5392
1.16

Persistence:

0.972

Half-life:

25 days