Skip to main content
V-Lab

CDX/CBOE NA Investment Grade 1-Month Volatility Index (BP Volatility) APARCH Volatility Analysis

Volatility prediction for Monday, July 20th, 2026

1 Day

96.65%

increased by 0.29%

1 Week

98.10%

increased by 1.74%

1 Month

102.83%

increased by 6.47%

Analysis last updated: Monday, July 20, 2026 at 11:39 AM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of CDX/CBOE NA Investment Grade 1-Month Volatility Index (BP Volatility) APARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

Mar 5, 2012 to Jul 17, 2026
Boundary Parameters

Model Insight

Volatility shocks decay with a half-life of 21 trading days, meaning a shock loses half its impact after approximately 21 days. The volatility power δ = 0.99 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

0.2407
6.44***
α

ARCH

Response to squared shocks

0.0573
16.44***
β

GARCH

Volatility persistence

0.9221
202.43***
γ

leverage

Additional response to negative shocks

-1.0000
-14.69***
δ

power

Transformation power

0.9913
14.65***

Persistence:

0.967

Half-life:

21 days