V-Lab
Ishares Investment Grade Corporate Bond Buywrite Strategy ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, August 24th, 2026
1 Day
5.98%
decreased by 1.87%
1 Week
6.20%
decreased by 1.65%
1 Month
6.99%
decreased by 0.86%
Analysis last updated: Friday, August 21, 2026 at 09:34 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Aug 19, 2022 to Aug 21, 2026Model Insight
With persistence 0.999, volatility shocks have a half-life of 581 trading days (~2.3 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 5.49 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 4.5222 | 4.68*** |
α ARCH Response to squared shocks | 0.3015 | 45.19*** |
β GARCH Volatility persistence | 0.9988 | 3,963.52*** |
ν DF Student-t tail thickness | 5.4905 | 14.00*** |
Persistence:
0.999
Half-life:
581 days
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