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Obayashi Corp GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, October 26th, 2026

1 Day

24.20%

decreased by 1.14%

1 Week

24.73%

decreased by 0.61%

1 Month

26.52%

increased by 1.18%

Analysis last updated: Sunday, October 25, 2026 at 05:26 AM UTC

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Date Range:

from

10/23/2024

to

10/23/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Obayashi 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 Oct 23, 2026

Model Insight

Volatility shocks decay with a half-life of 40 trading days, meaning a shock loses half its impact after approximately 40 days. Returns follow a Student-t distribution with v = 6.65 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 40-day half-lifev = 6.65 · fat tails
ParamValuet-stat
ωlong-run5.4233
1.99**
αscore0.0803
8.48***
βpersistence0.9830
102.74***
νDF6.6521
1.68*

0.983

Persistence

40d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

long-run

Long-run variance given a price move

5.4233
1.99**
α

score

Weight on the scaled score

0.0803
8.48***
β

persistence

Volatility persistence

0.9830
102.74***
ν

DF

Student-t tail thickness

6.6521
1.68*

Persistence:

0.983

Half-life:

40 days