V-Lab
Ishares S&P 500 EX S&P 1 ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, September 8th, 2026
1 Day
12.27%
decreased by 0.32%
1 Week
12.49%
decreased by 0.10%
1 Month
12.54%
decreased by 0.05%
Analysis last updated: Saturday, September 5, 2026 at 02:28 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jul 9, 2025 to Sep 4, 2026𝑓
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 0.6250 | 6.22*** |
| αARCH | 0.0389 | 0.13 |
| βGARCH | 0.0000 | 0.00 |
| νDF | 16.9174 | 0.01 |
0.000
Persistence-
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 0.6250 | 6.22*** |
α ARCH Response to squared shocks | 0.0389 | 0.13 |
β GARCH Volatility persistence | 0.0000 | 0.00 |
ν DF Student-t tail thickness | 16.9174 | 0.01 |
Persistence:
0.000
Half-life:
-
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