V-Lab
OMX Copenhagen 20 Index GAS-GARCH Student T Volatility Analysis
Volatility prediction for Wednesday, August 19th, 2026
1 Day
15.29%
decreased by 0.79%
1 Week
15.41%
decreased by 0.67%
1 Month
15.84%
decreased by 0.24%
Analysis last updated: Wednesday, August 19, 2026 at 05:40 PM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Aug 14, 2026Model Insight
Volatility shocks decay with a half-life of 55 trading days, meaning a shock loses half its impact after approximately 55 days. Returns follow a Student-t distribution with v = 6.11 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 | 1.5135 | 7.12*** |
α ARCH Response to squared shocks | 0.0728 | 31.83*** |
β GARCH Volatility persistence | 0.9874 | 542.84*** |
ν DF Student-t tail thickness | 6.1063 | 8.46*** |
Persistence:
0.987
Half-life:
55 days
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