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V-Lab

Boston Scientific Corp AGARCH Volatility Analysis

Volatility prediction for Monday, September 14th, 2026

1 Day

44.73%

decreased by 1.07%

1 Week

44.67%

decreased by 1.13%

1 Month

44.44%

decreased by 1.36%

Analysis last updated: Friday, September 11, 2026 at 11:49 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Boston Scientific Corp AGARCH

News Impact Curve

How returns affect tomorrow's volatility

Volatility Forecast

How volatility evolves over time

Parameter Estimates

May 20, 1992 to Sep 11, 2026

Model Insight

With persistence 0.990, volatility shocks have a half-life of 70 trading days (~0.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Asymmetry: negative returns raise volatility more

σ

AGARCH Model

Tap to view equation

High persistence: persistence 0.990, shock half-life ~70 daysAsymmetry: negative returns raise volatility more
ParamValuet-stat
ωconst0.0000
0.00
αARCH0.0454
9.94***
βGARCH0.9447
200.91***
γleverage1.2160
3.61***

0.990

Persistence

70d

Half-life
σ

AGARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0000
0.00
α

ARCH

Response to squared shocks

0.0454
9.94***
β

GARCH

Volatility persistence

0.9447
200.91***
γ

leverage

Additional response to negative shocks

1.2160
3.61***

Persistence:

0.990

Half-life:

70 days