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V-Lab

S&P GSCI Spot Index EGARCH Volatility Analysis

Volatility prediction for Tuesday, October 6th, 2026

1 Day

20.87%

decreased by 0.96%

1 Week

20.96%

decreased by 0.87%

1 Month

21.32%

decreased by 0.51%

Analysis last updated: Monday, October 5, 2026 at 11:09 PM UTC

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Date Range:

from

10/05/2024

to

10/05/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI 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 Oct 2, 2026

Model Insight

Volatility shocks decay with a half-life of 65 trading days, meaning a shock loses half its impact after approximately 65 days.

σ

EGARCH Model

Tap to view equation

Shock decay: Shocks decay with a 65-day half-life
ParamValuet-stat
ωconst0.0104
4.37***
αARCH0.1531
8.01***
βGARCH0.9893
419.56***
γleverage-0.0095
-0.60

0.989

Persistence

65d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0104
4.37***
α

ARCH

Response to squared shocks

0.1531
8.01***
β

GARCH

Volatility persistence

0.9893
419.56***
γ

leverage

Additional response to negative shocks

-0.0095
-0.60

Persistence:

0.989

Half-life:

65 days