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Taisei Corp GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, September 24th, 2026

1 Day

35.87%

decreased by 1.47%

1 Week

35.92%

decreased by 1.42%

1 Month

36.10%

decreased by 1.24%

Analysis last updated: Saturday, September 19, 2026 at 11:44 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Taisei Corp GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 3, 1990 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 62 trading days, meaning a shock loses half its impact after approximately 62 days. Returns follow a Student-t distribution with v = 5.27 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 62-day half-lifev = 5.27 · fat tails
ParamValuet-stat
ωconst5.7201
1.29
αARCH0.0657
8.32***
βGARCH0.9889
116.15***
νDF5.2730
2.20**

0.989

Persistence

62d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.7201
1.29
α

ARCH

Response to squared shocks

0.0657
8.32***
β

GARCH

Volatility persistence

0.9889
116.15***
ν

DF

Student-t tail thickness

5.2730
2.20**

Persistence:

0.989

Half-life:

62 days