V-Lab
Boston Scientific Corp GJR-GARCH Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
39.92%
decreased by 0.51%
1 Week
39.96%
decreased by 0.47%
1 Month
40.10%
decreased by 0.33%
Analysis last updated: Friday, September 4, 2026 at 10:38 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
May 20, 1992 to Sep 4, 2026Model Insight
With persistence 0.996, volatility shocks have a half-life of 166 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 292% more than positive returns
σ
GJR-GARCH Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.0325 | 2.68*** |
α ARCH Response to squared shocks | 0.0134 | 3.00*** |
β GARCH Volatility persistence | 0.9630 | 180.63*** |
γ leverage Additional response to negative shocks | 0.0390 | 3.57*** |
Persistence:
0.996
Half-life:
166 days
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