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ABM Industries Inc GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, August 24th, 2026

1 Day

18.87%

decreased by 0.31%

1 Week

19.47%

increased by 0.29%

1 Month

21.47%

increased by 2.29%

Analysis last updated: Friday, August 21, 2026 at 10:24 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of ABM Industries Inc GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Aug 21, 2026

Model Insight

Volatility shocks decay with a half-life of 36 trading days, meaning a shock loses half its impact after approximately 36 days. Returns follow a Student-t distribution with v = 4.14 degrees of freedom, capturing fatter tails than a normal distribution.

𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

3.8403
4.86***
α

ARCH

Response to squared shocks

0.0845
31.63***
β

GARCH

Volatility persistence

0.9807
235.35***
ν

DF

Student-t tail thickness

4.1411
12.14***

Persistence:

0.981

Half-life:

36 days