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V-Lab

ICE BofAML U.S. Bond Market Option Volatility Estimate Index APARCH Volatility Analysis

Volatility prediction for Wednesday, September 16th, 2026

1 Day

66.45%

decreased by 3.91%

1 Week

66.90%

decreased by 3.46%

1 Month

68.30%

decreased by 2.06%

Analysis last updated: Wednesday, September 16, 2026 at 04:03 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of ICE BofAML U.S. Bond Market Option Volatility Estimate Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Jan 2, 1990 to Sep 11, 2026

Model Insight

This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 197% more than negative returns. Volatility rises more after gains than after losses, the reverse of the usual leverage effect and uncommon among risky assets. The volatility power δ = 1.14 sits below 2, so large shocks influence volatility less than quadratically, a more outlier-robust response than standard GARCH.

σ

APARCH Model

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Inverse leverage: Positive returns increase volatility 197% more than negative returnsδ = 1.14 · sub-quadratic power
ParamValuet-stat
ωconst0.2333
3.88***
αARCH0.0799
6.29***
βGARCH0.8926
58.54***
γleverage-0.4458
-2.75***
δpower1.1354
7.98***

0.958

Persistence

16d

Half-life
σ

APARCH Model

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ParameterValuet-statistic
ω

const

Unconditional variance weight

0.2333
3.88***
α

ARCH

Response to squared shocks

0.0799
6.29***
β

GARCH

Volatility persistence

0.8926
58.54***
γ

leverage

Additional response to negative shocks

-0.4458
-2.75***
δ

power

Transformation power

1.1354
7.98***

Persistence:

0.958

Half-life:

16 days