V-Lab
Ishares S&P 500 EX S&P 1 ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, August 17th, 2026
1 Day
12.32%
decreased by 0.33%
1 Week
12.61%
decreased by 0.04%
1 Month
12.67%
increased by 0.02%
Analysis last updated: Saturday, August 15, 2026 at 02:35 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 9, 2025 to Aug 14, 2026𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6385 | 25.79*** |
α ARCH Response to squared shocks | 0.0537 | 0.71 |
β GARCH Volatility persistence | 0.0000 | 0.00 |
ν DF Student-t tail thickness | 16.0500 | 0.05 |
Persistence:
0.000
Half-life:
-
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