Skip to main content
V-Lab
V-Lab

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

Volatility prediction for Friday, September 11th, 2026

1 Day

19.09%

increased by 1.14%

1 Week

19.08%

increased by 1.13%

1 Month

19.04%

increased by 1.09%

Analysis last updated: Thursday, September 10, 2026 at 11:03 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

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

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 16, 1995 to Sep 4, 2026

Model Insight

Volatility shocks decay with a half-life of 38 trading days, meaning a shock loses half its impact after approximately 38 days.

σ

GJR-GARCH Model

Tap to view equation

Shock decay: Shocks decay with a 38-day half-life
ParamValuet-stat
ωconst0.0254
5.56***
αARCH0.0626
5.97***
βGARCH0.9205
139.26***
γleverage-0.0025
-0.13

0.982

Persistence

38d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0254
5.56***
α

ARCH

Response to squared shocks

0.0626
5.97***
β

GARCH

Volatility persistence

0.9205
139.26***
γ

leverage

Additional response to negative shocks

-0.0025
-0.13

Persistence:

0.982

Half-life:

38 days