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Chevron Corp GAS-GARCH Student T Volatility Analysis

Volatility prediction for Tuesday, September 15th, 2026

1 Day

21.58%

decreased by 0.36%

1 Week

21.67%

decreased by 0.27%

1 Month

22.00%

increased by 0.06%

Analysis last updated: Monday, September 14, 2026 at 09:46 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Chevron Corp 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 Sep 11, 2026

Model Insight

Volatility shocks decay with a half-life of 50 trading days, meaning a shock loses half its impact after approximately 50 days. Returns follow a Student-t distribution with v = 8.11 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 50-day half-lifev = 8.11 · fat tails
ParamValuet-stat
ωconst2.4290
2.55**
αARCH0.0634
9.79***
βGARCH0.9864
154.82***
νDF8.1131
1.32

0.986

Persistence

50d

Half-life
𝑓

GAS-GARCH-T Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

2.4290
2.55**
α

ARCH

Response to squared shocks

0.0634
9.79***
β

GARCH

Volatility persistence

0.9864
154.82***
ν

DF

Student-t tail thickness

8.1131
1.32

Persistence:

0.986

Half-life:

50 days