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S&P GSCI Softs Spot Index APARCH Volatility Analysis

Volatility prediction for Friday, October 16th, 2026

1 Day

21.09%

decreased by 0.48%

1 Week

21.07%

decreased by 0.50%

1 Month

20.99%

decreased by 0.58%

Analysis last updated: Thursday, October 15, 2026 at 11:02 PM UTC

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Date Range:

from

10/15/2024

to

10/15/2026

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of S&P GSCI Softs Spot Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 17, 1995 to Oct 9, 2026

Model Insight

Volatility shocks decay with a half-life of 59 trading days, meaning a shock loses half its impact after approximately 59 days.

σ

APARCH Model

Tap to view equation

Shock decay: Shocks decay with a 59-day half-life
ParamValuet-stat
ωconst0.0186
4.04***
αARCH0.0440
6.05***
βGARCH0.9451
127.05***
γleverage-0.0863
-1.87*
δpower1.9280
7.57***

0.988

Persistence

59d

Half-life
σ

APARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0186
4.04***
α

ARCH

Response to squared shocks

0.0440
6.05***
β

GARCH

Volatility persistence

0.9451
127.05***
γ

leverage

Additional response to negative shocks

-0.0863
-1.87*
δ

power

Transformation power

1.9280
7.57***

Persistence:

0.988

Half-life:

59 days