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V-Lab

S&P GSCI Spot Index MF2-GARCH Volatility Analysis

Volatility prediction for Monday, September 21st, 2026

1 Day

20.27%

decreased by 0.61%

1 Week

20.34%

decreased by 0.54%

1 Month

20.56%

decreased by 0.32%

Analysis last updated: Saturday, September 19, 2026 at 12:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI Spot Index MF2-GARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 18, 2026

Model Insight

Volatility shocks decay with a half-life of 27 trading days, meaning a shock loses half its impact after approximately 27 days.

σ

MF2-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 27-day half-life
ParamValuet-stat
mwindow126
αARCH0.0586
5.52***
βGARCH0.9057
86.99***
γleverage0.0198
1.63
λ₁tau intercept0.0067
1.17
λ₂forecast adj.0.0633
2.39**
λ₃tau persistence0.9339
32.85***

0.974

Persistence

27d

Half-life
σ

MF2-GARCH Model

Tap to view equation

ParameterValuet-statistic
m

window

Rolling window length

126
α

ARCH

Response to squared shocks

0.0586
5.52***
β

GARCH

Volatility persistence

0.9057
86.99***
γ

leverage

Additional response to negative shocks

0.0198
1.63
λ₁

tau intercept

Baseline long-term coefficient

0.0067
1.17
λ₂

forecast adj.

Forecast performance sensitivity

0.0633
2.39**
λ₃

tau persistence

Long-term factor persistence

0.9339
32.85***

Persistence:

0.974

Half-life:

27 days