V-Lab
Oslo Stock Exchange All Share Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Friday, September 11th, 2026
1 Day
10.75%
decreased by 0.01%
1 Week
11.14%
increased by 0.38%
1 Month
12.46%
increased by 1.70%
Analysis last updated: Friday, September 11, 2026 at 05:41 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 9, 2026Model Insight
Volatility shocks decay with a half-life of 39 trading days, meaning a shock loses half its impact after approximately 39 days. Returns follow a Student-t distribution with v = 6.97 degrees of freedom, capturing fatter tails than a normal distribution.
𝑓
GAS-GARCH-T Model
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Shock decay: Shocks decay with a 39-day half-lifev = 6.97 · fat tails
| Param | Value | t-stat |
|---|---|---|
| ωconst | 1.4693 | 2.23** |
| αARCH | 0.0869 | 8.80*** |
| βGARCH | 0.9826 | 119.53*** |
| νDF | 6.9669 | 1.70* |
0.983
Persistence39d
Half-life𝑓
GAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 1.4693 | 2.23** |
α ARCH Response to squared shocks | 0.0869 | 8.80*** |
β GARCH Volatility persistence | 0.9826 | 119.53*** |
ν DF Student-t tail thickness | 6.9669 | 1.70* |
Persistence:
0.983
Half-life:
39 days
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