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BGI Group Joint Stock Co GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

44.83%

decreased by 5.24%

1 Week

48.36%

decreased by 1.71%

1 Month

59.23%

increased by 9.16%

Analysis last updated: Sunday, September 20, 2026 at 04:31 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of BGI Group Joint Stock Co GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 4, 2011 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 38 trading days, meaning a shock loses half its impact after approximately 38 days. Returns follow a Student-t distribution with v = 2.52 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 38-day half-lifev = 2.52 · fat tails
ParamValuet-stat
ωconst44.6272
0.65
αARCH0.1194
10.39***
βGARCH0.9819
34.89***
νDF2.5169
12.62***

0.982

Persistence

38d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

44.6272
0.65
α

ARCH

Response to squared shocks

0.1194
10.39***
β

GARCH

Volatility persistence

0.9819
34.89***
ν

DF

Student-t tail thickness

2.5169
12.62***

Persistence:

0.982

Half-life:

38 days