V-Lab
Goldman Sachs Equal Weight US Large Cap Equity ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Tuesday, July 28th, 2026
1 Day
10.35%
increased by 0.56%
1 Week
10.82%
increased by 1.03%
1 Month
12.21%
increased by 2.42%
Analysis last updated: Monday, July 27, 2026 at 09:18 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Sep 15, 2017 to Jul 24, 2026Model Insight
Volatility shocks decay with a half-life of 22 trading days, meaning a shock loses half its impact after approximately 22 days. Returns follow a Student-t distribution with v = 8.15 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 | 1.0654 | 9.47*** |
α ARCH Response to squared shocks | 0.1324 | 22.90*** |
β GARCH Volatility persistence | 0.9686 | 251.12*** |
ν DF Student-t tail thickness | 8.1519 | 4.47*** |
Persistence:
0.969
Half-life:
22 days
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