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S&P GSCI Copper Spot Index GJR-GARCH Volatility Analysis

Volatility prediction for Monday, November 2nd, 2026

1 Day

17.92%

increased by 0.42%

1 Week

18.05%

increased by 0.55%

1 Month

18.50%

increased by 1.00%

Analysis last updated: Friday, October 30, 2026 at 11:05 PM UTC

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Date Range:

from

10/30/2024

to

10/30/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI Copper Spot Index GJR-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Oct 30, 2026

Model Insight

Volatility shocks decay with a half-life of 60 trading days, meaning a shock loses half its impact after approximately 60 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 60-day half-life
ParamValuet-stat
ωconst0.0237
4.32***
αARCH0.0416
4.07***
βGARCH0.9411
121.21***
γleverage0.0117
0.73

0.989

Persistence

60d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0237
4.32***
α

ARCH

Response to squared shocks

0.0416
4.07***
β

GARCH

Volatility persistence

0.9411
121.21***
γ

leverage

Additional response to negative shocks

0.0117
0.73

Persistence:

0.989

Half-life:

60 days