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S&P GSCI Petroleum Spot Index EGARCH Volatility Analysis

Volatility prediction for Monday, September 7th, 2026

1 Day

33.60%

decreased by 2.04%

1 Week

33.75%

decreased by 1.89%

1 Month

34.29%

decreased by 1.35%

Analysis last updated: Friday, September 4, 2026 at 11:31 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI Petroleum Spot Index EGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 47 trading days, meaning a shock loses half its impact after approximately 47 days.

σ

EGARCH Model

Tap to view equation

Shock decay: Shocks decay with a 47-day half-life
ParamValuet-stat
ωconst0.0265
5.10***
αARCH0.1581
7.49***
βGARCH0.9853
348.03***
γleverage-0.0279
-1.70*

0.985

Persistence

47d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0265
5.10***
α

ARCH

Response to squared shocks

0.1581
7.49***
β

GARCH

Volatility persistence

0.9853
348.03***
γ

leverage

Additional response to negative shocks

-0.0279
-1.70*

Persistence:

0.985

Half-life:

47 days