Boston Scientific Corp GJR-GARCH Volatility Analysis
Volatility prediction for Wednesday, October 21st, 2026
1 Day
33.51%
decreased by 0.45%
1 Week
33.62%
decreased by 0.34%
1 Month
34.01%
increased by 0.05%
Analysis last updated: Tuesday, October 20, 2026 at 10:20 PM UTC
Press Delete or Backspace to remove this series.
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 20, 1992 to Oct 16, 2026Model Insight
With persistence 0.996, volatility shocks have a half-life of 160 trading days (~0.6 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate.
Leverage: Negative returns increase volatility 286% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
High persistence: persistence 0.996, shock half-life ~160 daysLeverage: Negative returns increase volatility 286% more than positive returns
| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.0329 | 2.71*** |
| αARCH | 0.0136 | 3.03*** |
| βGARCH | 0.9627 | 179.61*** |
| γleverage | 0.0388 | 3.52*** |
0.996
Persistence160d
Half-lifeσ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0329 | 2.71*** |
α ARCH Response to squared shocks | 0.0136 | 3.03*** |
β GARCH Volatility persistence | 0.9627 | 179.61*** |
γ leverage Additional response to negative shocks | 0.0388 | 3.52*** |
Persistence:
0.996
Half-life:
160 days
Other Boston Scientific Corp Analyses
Other GJR-GARCH Analyses on Equities