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V-Lab

Obayashi Corp GAS-GARCH Student T Volatility Analysis

Volatility prediction for Thursday, October 8th, 2026

1 Day

25.04%

decreased by 1.31%

1 Week

25.49%

decreased by 0.86%

1 Month

27.05%

increased by 0.70%

Analysis last updated: Thursday, October 8, 2026 at 07:42 PM UTC

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Date Range:

from

10/07/2024

to

10/07/2026

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 2, 2026

Model Insight

Volatility shocks decay with a half-life of 41 trading days, meaning a shock loses half its impact after approximately 41 days. Returns follow a Student-t distribution with v = 5.73 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 41-day half-lifev = 5.73 · fat tails
ParamValuet-stat
ωconst5.2282
1.66*
αARCH0.0756
8.02***
βGARCH0.9832
89.11***
νDF5.7293
1.90*

0.983

Persistence

41d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

5.2282
1.66*
α

ARCH

Response to squared shocks

0.0756
8.02***
β

GARCH

Volatility persistence

0.9832
89.11***
ν

DF

Student-t tail thickness

5.7293
1.90*

Persistence:

0.983

Half-life:

41 days