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Costar Group Co Ltd GAS-GARCH Student T Volatility Analysis

Volatility prediction for Monday, October 12th, 2026

1 Day

35.35%

decreased by 1.21%

1 Week

36.24%

decreased by 0.32%

1 Month

39.26%

increased by 2.70%

Analysis last updated: Saturday, October 10, 2026 at 07:37 PM UTC

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Date Range:

from

10/09/2024

to

10/09/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Costar Group Co Ltd GAS-GARCH-T

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Dec 3, 2007 to Oct 9, 2026

Model Insight

Volatility shocks decay with a half-life of 42 trading days, meaning a shock loses half its impact after approximately 42 days. Returns follow a Student-t distribution with v = 5.21 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 42-day half-lifev = 5.21 · fat tails
ParamValuet-stat
ωconst12.7793
1.10
αARCH0.0682
5.62***
βGARCH0.9836
57.92***
νDF5.2095
1.43

0.984

Persistence

42d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

12.7793
1.10
α

ARCH

Response to squared shocks

0.0682
5.62***
β

GARCH

Volatility persistence

0.9836
57.92***
ν

DF

Student-t tail thickness

5.2095
1.43

Persistence:

0.984

Half-life:

42 days