V-Lab
5Y US Treasury CMT 5 Year GAS-GARCH Student T Volatility Analysis
Volatility prediction for Thursday, September 24th, 2026
1 Day
20.17%
1 Week
20.20%
1 Month
20.32%
Analysis last updated: Thursday, September 24, 2026 at 03:00 AM UTC
News Impact Curve
How returns affect tomorrow's volatilityVolatility Forecast
How volatility evolves over timeParameter Estimates
Jan 1, 1990 to Sep 18, 2026Model Insight
With persistence 0.998, volatility shocks have a half-life of 303 trading days (~1.2 years), close to a unit root, so long-run forecasts are highly sensitive to this estimate. Returns follow a Student-t distribution with v = 7.17 degrees of freedom, capturing fatter tails than a normal distribution.
GAS-GARCH-T Model
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| Param | Value | t-stat |
|---|---|---|
| ωconst | 2.7258 | 2.24** |
| αARCH | 0.0473 | 15.19*** |
| βGARCH | 0.9977 | 890.02*** |
| νDF | 7.1657 | 3.76*** |
0.998
Persistence303d
Half-lifeGAS-GARCH-T Model
Tap to view equation
| Parameter | Value | t-statistic |
|---|---|---|
ω const Unconditional variance weight | 2.7258 | 2.24** |
α ARCH Response to squared shocks | 0.0473 | 15.19*** |
β GARCH Volatility persistence | 0.9977 | 890.02*** |
ν DF Student-t tail thickness | 7.1657 | 3.76*** |
Persistence:
0.998
Half-life:
303 days
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