V-Lab
Oslo Stock Exchange All Share Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, July 17th, 2026
1 Day
15.60%
increased by 1.05%
1 Week
15.74%
increased by 1.19%
1 Month
16.24%
increased by 1.69%
Analysis last updated: Monday, July 20, 2026 at 02:14 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to May 15, 2026Model Insight
Volatility shocks decay with a half-life of 40 trading days, meaning a shock loses half its impact after approximately 40 days. Returns follow a Student-t distribution with v = 6.95 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 | 1.4845 | 8.82*** |
α ARCH Response to squared shocks | 0.0869 | 35.07*** |
β GARCH Volatility persistence | 0.9826 | 475.39*** |
ν DF Student-t tail thickness | 6.9519 | 6.79*** |
Persistence:
0.983
Half-life:
40 days
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