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S&P GSCI Copper Spot Index EGARCH Volatility Analysis

Volatility prediction for Thursday, October 8th, 2026

1 Day

16.39%

decreased by 0.33%

1 Week

16.62%

decreased by 0.10%

1 Month

17.49%

increased by 0.77%

Analysis last updated: Wednesday, October 7, 2026 at 11:05 PM UTC

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Date Range:

from

10/07/2024

to

10/07/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI Copper 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 52 trading days, meaning a shock loses half its impact after approximately 52 days.

σ

EGARCH Model

Tap to view equation

Shock decay: Shocks decay with a 52-day half-life
ParamValuet-stat
ωconst0.0146
4.73***
αARCH0.1097
7.75***
βGARCH0.9868
332.60***
γleverage-0.0132
-1.07

0.987

Persistence

52d

Half-life
σ

EGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0146
4.73***
α

ARCH

Response to squared shocks

0.1097
7.75***
β

GARCH

Volatility persistence

0.9868
332.60***
γ

leverage

Additional response to negative shocks

-0.0132
-1.07

Persistence:

0.987

Half-life:

52 days