Skip to main content
V-Lab
V-Lab

S&P GSCI All Cattle Spot Index APARCH Volatility Analysis

Volatility prediction for Wednesday, September 9th, 2026

1 Day

17.16%

decreased by 0.07%

1 Week

17.14%

decreased by 0.09%

1 Month

17.06%

decreased by 0.17%

Analysis last updated: Tuesday, September 8, 2026 at 11:30 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI All Cattle Spot Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 7, 2002 to Sep 8, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 374% more than equivalent positive returns. The volatility power δ = 1.42 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

Tap to view equation

Leverage: Negative returns increase volatility 374% more than positive returnsδ = 1.42 · sub-quadratic power
ParamValuet-stat
ωconst0.0130
6.17***
αARCH0.0420
6.36***
βGARCH0.9493
157.99***
γleverage0.4987
4.38***
δpower1.4214
7.13***

0.987

Persistence

55d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0130
6.17***
α

ARCH

Response to squared shocks

0.0420
6.36***
β

GARCH

Volatility persistence

0.9493
157.99***
γ

leverage

Additional response to negative shocks

0.4987
4.38***
δ

power

Transformation power

1.4214
7.13***

Persistence:

0.987

Half-life:

55 days