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V-Lab

Kelly Services Inc APARCH Volatility Analysis

Volatility prediction for Monday, July 27th, 2026

1 Day

38.18%

decreased by 1.10%

1 Week

38.47%

decreased by 0.81%

1 Month

39.56%

increased by 0.28%

Analysis last updated: Friday, July 24, 2026 at 09:50 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of Kelly Services Inc APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Jul 24, 2026

Model Insight

This asset exhibits a strong leverage effect: negative returns increase next-day volatility 105% more than equivalent positive returns. The volatility power δ = 1.01 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

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0363
12.77***
α

ARCH

Response to squared shocks

0.0508
21.36***
β

GARCH

Volatility persistence

0.9484
379.35***
γ

leverage

Additional response to negative shocks

0.3398
8.19***
δ

power

Transformation power

1.0127
23.94***

Persistence:

0.989

Half-life:

62 days