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V-Lab

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

Volatility prediction for Friday, August 7th, 2026

1 Day

17.40%

decreased by 0.36%

1 Week

17.54%

decreased by 0.22%

1 Month

18.05%

increased by 0.29%

Analysis last updated: Thursday, August 6, 2026 at 11:04 PM UTC

Date Range:

from

to

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 Jul 31, 2026

Model Insight

This asset exhibits a modest leverage effect: negative returns increase next-day volatility 30% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0235
17.23***
α

ARCH

Response to squared shocks

0.0414
16.27***
β

GARCH

Volatility persistence

0.9411
484.62***
γ

leverage

Additional response to negative shocks

0.0122
3.01***

Persistence:

0.989

Half-life:

61 days