V-Lab
Columbia Corporate Bond ETF GAS-GARCH Student T Volatility Analysis
Volatility prediction for Monday, July 27th, 2026
1 Day
4.02%
decreased by 0.26%
1 Week
4.11%
decreased by 0.17%
1 Month
4.32%
increased by 0.04%
Analysis last updated: Saturday, July 25, 2026 at 02:23 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Dec 11, 2025 to Jul 24, 2026Boundary Parameters
Model Insight
Volatility shocks decay with a half-life of 9 trading days, meaning a shock loses half its impact after approximately 9 days. Returns follow a Student-t distribution with v = 200.00 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 | 0.0842 | 7.56*** |
α ARCH Response to squared shocks | 0.1351 | 2.47** |
β GARCH Volatility persistence | 0.9239 | 44.66*** |
ν DF Student-t tail thickness | 200.0000 | 0.02 |
Persistence:
0.924
Half-life:
9 days
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