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ICE BofAML U.S. Bond Market 6 Month Option Volatility Estimate Index APARCH Volatility Analysis

Volatility prediction for Friday, September 4th, 2026

1 Day

29.63%

decreased by 1.93%

1 Week

30.72%

decreased by 0.84%

1 Month

34.01%

increased by 2.45%

Analysis last updated: Friday, September 4, 2026 at 11:27 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

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graph of ICE BofAML U.S. Bond Market 6 Month Option Volatility Estimate Index APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Feb 26, 2008 to Aug 27, 2026

Model Insight

This asset shows a rare inverse leverage effect: positive returns raise next-day volatility 100% 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 = 1.52 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 100% more than negative returnsδ = 1.52 · sub-quadratic power
ParamValuet-stat
ωconst0.1762
3.81***
αARCH0.1569
5.80***
βGARCH0.8226
31.71***
γleverage-0.2244
-2.09**
δpower1.5173
6.73***

0.961

Persistence

17d

Half-life
σ

APARCH Model

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ParameterValuet-statistic
ω

const

Unconditional variance weight

0.1762
3.81***
α

ARCH

Response to squared shocks

0.1569
5.80***
β

GARCH

Volatility persistence

0.8226
31.71***
γ

leverage

Additional response to negative shocks

-0.2244
-2.09**
δ

power

Transformation power

1.5173
6.73***

Persistence:

0.961

Half-life:

17 days