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Boston Scientific Corp GJR-GARCH Volatility Analysis

Volatility prediction for Friday, September 18th, 2026

1 Day

44.39%

decreased by 0.64%

1 Week

44.39%

decreased by 0.64%

1 Month

44.39%

decreased by 0.64%

Analysis last updated: Thursday, September 17, 2026 at 09:40 PM UTC

Date Range:

from

to

6M ·

1Y ·

2Y ·

5Y ·

10Y ·

All

graph of Boston Scientific Corp GJR-GARCH

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 0.996, volatility shocks have a half-life of 168 trading days (~0.7 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.

Leverage: Negative returns increase volatility 294% more than positive returns

σ

GJR-GARCH Model

Tap to view equation

High persistence: persistence 0.996, shock half-life ~168 daysLeverage: Negative returns increase volatility 294% more than positive returns
ParamValuet-stat
ωconst0.0323
2.67***
αARCH0.0133
2.99***
βGARCH0.9631
181.31***
γleverage0.0390
3.59***

0.996

Persistence

168d

Half-life
σ

GJR-GARCH Model

Tap to view equation

ParameterValuet-statistic
ω

const

Unconditional variance weight

0.0323
2.67***
α

ARCH

Response to squared shocks

0.0133
2.99***
β

GARCH

Volatility persistence

0.9631
181.31***
γ

leverage

Additional response to negative shocks

0.0390
3.59***

Persistence:

0.996

Half-life:

168 days