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V-Lab

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

Volatility prediction for Friday, July 17th, 2026

1 Day

18.76%

decreased by 0.41%

1 Week

18.86%

decreased by 0.31%

1 Month

19.24%

increased by 0.07%

Analysis last updated: Thursday, July 16, 2026 at 11:03 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 10, 2026

Model Insight

This asset exhibits a modest leverage effect: negative returns increase next-day volatility 29% more than equivalent positive returns.

σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0234
17.24***
α

ARCH

Response to squared shocks

0.0414
16.28***
β

GARCH

Volatility persistence

0.9412
485.15***
γ

leverage

Additional response to negative shocks

0.0122
3.01***

Persistence:

0.989

Half-life:

61 days